Doom is one of the most widelyported video games.^[1] Since the originalMS-DOS version, it has been released officially for a number ofoperating systems,video game consoles,handheld game consoles, and other devices. Some of the ports are replications of the DOS version, while others differ considerably, including modifications to the level designs, monsters and game engine, with some ports offering content not included in the original DOS version. Since theDoom engine'ssource code was released to the public in 1997, hundreds of fan-made ports to various hardware have been developed.

This was the version that the MS-DOS product emerged from, since, at the time,id Software was using aNeXTcube for its graphic-engine development. This version is sluggish on anything below an 040 NeXTstation/cube (though it runs smoother with a higher amount of memory), and is missing sound, which was added on the PC side. With NeXT-Step based on i486 architecture, it ran smoothly under all conditions up to screen sizes of 400% with newer hardware. The version running on NeXT is programmed by John Carmack, John Romero, and Dave Taylor.^{[citation needed]}

Doom was ported toOS/2 by an independent contractor, Jim Thomas, who was hired byIBM to port it andSimCity.^[2] A successful version was demoed in 1994 running in an OS/2PM window.^[3]

Doom was ported toIRIX during the summer of 1994 byDave D. Taylor. IRIXDoom was originally based on the unreleased MS-DOS version 1.5, though later updates were based on versions 1.6 and 1.8. No effort was made to take advantage ofSGI's advanced graphics hardware, and like many other ports the game was rendered entirely insoftware rendering mode.

Doom was ported toSolaris in late 1994, and was designed to run with game files fromDoom 1.8. In the readme, the port is credited to "Dave Taylor and the rest of the folks at id Software". It runs on Solaris 2.4 and later. The distribution contained two versions: one for regular X11, and another for Sun DGA.^{[citation needed]}

Doom for Mac was released on November 4, 1994.^{[citation needed]}The Ultimate Doom,Doom II, andFinal Doom were ported by Lion Entertainment and released by GT Interactive using a Mac OS launcher application to run original PC WADs. The Mac version runs onSystem 7 throughMac OS 9 and requires a68040 orPowerPC processor. Although it can run inClassic underMac OS X onPower Macs,Panther andTiger cause graphic artifacts due to the later version of Classic having a double-buffered screen. It can also be played under emulation onIntel andApple silicon Macs withSheepShaver andQEMU. In addition to an adjustable viewport, it supports rendering at low or high resolutions, and allows network play overAppleTalk as well as IPX.

Doom was ported toLinux byid Software programmer Dave Taylor in 1994. The last LinuxDoom binaries were provided by id Software on October 13, 1996, through the company's FTP server.

The source code to the Linux version ofDoom was released byid Software on December 23, 1997, under a non-profitEnd user license agreement; it was re-released on October 3, 1999, under the terms of theGPL-2.0-or-later license. However, the source code to the DOS andWindows versions of the game were not released, due to copyright issues concerning the sound library used by original DOS version and id Software having no access to the source code of the Windows port.^[4]

The first version ofDoom for Windows was released under the nameDoom 95, on August 20, 1996. It was compatible withWindows 95 and up, and was able to use WADs from the DOS versions. It also allowed users to set up multiplayer games much easier than in DOS. It was included withFinal Doom. The port was project-led byGabe Newell and other later founders ofValve.^[5]

On September 26, 2001,Doom Collector's Edition was released, containingThe Ultimate Doom,Doom II, andFinal Doom. It was re-released on January 1, 2004^[6] with added preview content forDoom 3. Some early versions ofDoom 3 included the Collector's Edition and a small demon figurine as a bonus. TheBFG Edition ofDoom 3, released on October 15, 2012, includesThe Ultimate Doom as well asDoom II.

On August 3, 2007,The Ultimate Doom,Doom II, andFinal Doom were released onSteam. This release runs the original DOS versions of the game usingDOSBox, a DOS emulator.

AcornDoom was released for both the 26 and 32 bitARM incarnations ofRISC OS, by R-Comp Interactive, on February 7, 1998.^[7] It was made available in a bundle of threeDoom games:The Ultimate Doom,Doom II, andMaster Levels for Doom II, as well as theMaximum Doom add-on pack,^[8] which contains over 3,000 user levels.^[9]

External videos
Video comparison ofDoom console ports byDigital Foundry

The32X version ofDoom was developed and published bySega and was released on November 21, 1994.^[10] It features 17 of the 18 levels from the first two episodes, but none from episode three. This version lacks multiplayer support, does not play in a full screen, and only has the front sprites for the monsters. 10 levels are missing from the original version (twice as many missing levels as any other version of the game). ADOS prompt shows up after the credits roll if the player finishes the game either using cheats or starting from any level other than the first level, locking up the game.^[11] Similarly, the secret level cannot be accessed in these scenarios. Due to the lack of the third episode, theBFG 9000 can only be obtained through the use of cheats. Due to poor use of theYM2612 sound chip, this version's soundtrack is considered inferior to that of other versions, and many of the sound effects are missing. As with most mid-90s console ports, the levels come from the Atari Jaguar version. This version does not feature the Cyberdemon, the Spider Mastermind, or the Spectre. There is a level select option that allows the player to start on any of the first fifteen levels, although there is no way to save the game or settings.

In 1995, the 32X version of the game was given a score of 30 out of 40 byFamicom Tsūshin.^[12]

TheJaguar version was published byAtari and was released on November 28, 1994.^[13] This version has more levels than theSNES and32X versions, and as many levels as the3DO andGBA versions. id Software had to strip down the port to allow the game to fit on a 2 megabyte cartridge.^[14] It features 22 of the PC version's 27 levels, though many of them are simplified, plus two new levels (the levels titled "Tower of Babel" and "Hell Keep" are not the same as the PC levels of the same names).^[15] Unlike the 32X, SNES, and 3DO versions, this version of the game display occupies the full screen, albeit with an opaque status bar at the bottom. The game runs at a fairly constant and fluid frame-rate. The levels use more complex lighting effects, but have less variation in floor depth and ceiling height. It lacks the Cyberdemon, the Spider Mastermind, and the Spectre. It is compatible with the JagLink 2-console networking device for two players to play deathmatch.^[16] The Jaguar version does not have any music during gameplay, but plays the title theme and intermission music with new instruments. Game settings and progress through the levels are saved automatically, and the player can start a new game anywhere up to the last level reached. Instead of having to cycle through the selection of weapons, the player can select a weapon by pressing its corresponding button on the controller's number pad.^[16]

Next Generation gave it four out of five stars and called it "Definitely the best Jaguar title we've seen so far."^[17]

James "Quasar" Haley, one of the developers of the remastered version, confirmed the PC version of the gameKilling Time was based on theAtari Jaguar version ofDoom that had previously been worked on by developerRebecca Heineman.^[18]

The SNES version ofDoom was developed bySculptured Software, published byWilliams Entertainment, and released on September 1, 1995. The head programmer of the port,Randy Linden, created a new game engine called the Reality engine for the port. The game makes use of theSuper FX powered GSU-2 chip (often referred to as the Super FX 2 chip), and was one of the few SNES games to feature a colored cartridge; the game was a red cartridge in the United States. The game was released as a standard gray cartridge in Europe, Australia, and Japan.

The SNES version ofDoom features all five of the PC version levels that were missing from the Atari Jaguar version, but is missing a different set of five levels instead. Like the Sega 32X version, this version does not include exclusive levels. The levels included resemble the PC levels more so than other ports. This was also the only home console port ofDoom released in the 1990s to feature all three of the original secret levels and boss levels from the PC version. Like the Sega 32X version, the player'sheads-up display does not utilize the whole screen, and enemies are only animated from the front, which means that they always face the player. This rendersmonster infighting impossible, although it is possible for monsters of the same type to damage each other with projectiles. This version of the game lacks both battery back-up saves and a password system, meaning that each episode must be finished from the beginning. Multiplayer was only available if anXBAND modem was used, which included support for two player deathmatch. This version lacks the Spectre enemy (replaced with regular Demon monsters), though it does feature the Cyberdemon and Spider Mastermind boss monsters that the Atari Jaguar, Sega 32X, and 3DO versions lack. In the North American and PAL versions, episode two cannot be played on the "I'm Too Young to Die" and "Hey, Not Too Rough" difficulties, and episode three can only be played on "Ultra-Violence" and "Nightmare" difficulties if one is selected from the game's episode select menu, though it is possible to play episode three on the "Hurt Me Plenty" difficulty if the player beats episode two on that difficulty setting. In the Japanese version, however, all three episodes can be played on any difficulty level.

The automap display takes advantage of the rotating and scaling abilities of the Super FX 2 chip, with the entire map spinning around the player's position rather than the player being portrayed with an arrow. In the Japanese version, the player is able to see enemies on the automap, a feature not present in the PC and many other ports ofDoom. Due to hardware limitations, particles such as blood impacts, smoke, or bullet sparks are not present, and floors and ceilings are not textured. The chaingun is capable of firing a single bullet (although firing once still plays two firing sounds). Moreover, the shotgun does not fire seven individual shots as it does in the PC version, but rather functions like a hunting rifle. This allows the player to shoot (and be shot) from a distance using the shotgun with no decrease in power. This version ofDoom features support for theSNES Mouse peripheral.

Reviews for the SNES version were largely positive.Super Play awarded the game a 92% score, calling it "rather excellent" and describing it as a "game they said could never be done” on the SNES.^[24] It further described the game as being the "most technically accomplished SNES title yet seen" and described it as "one of the best reasons to own" a SNES. It stated that the game had fine joypad controls, albeit with a touch of "treacley responsiveness" during the most action heavy moments.^[24]Nintendo Magazine System awarded it 95% describing the game as "fantastic".^[22]Total! described it as “one of the finest SNES games ever created” awarding it 93%.^[23]GamesMaster (magazine) described the game as "fabulous" in spite of it moving slower than the other versions, and awarded it 93%, saying that it surpassed the 32X version.^[19]Console + reviewers described the game as 'excellent' and awarded it 92%. AHL described it as the best console port of Doom thus far, surpassing the 32X and Jaguar versions. Marc stated that making negative comparisons with the PC version was 'ridiculous' as a PC costs over 10,000 francs, and in spite of a few small flaws, he would still buy the SNES version with no regrets.^[21] Olivier ofJoypad magazine described it as a ‘gem’ on the SNES and awarded it 94% saying that the developers pushed the limitations of the machine to the extreme.^[26]Super Power described it as a 'super cool, fun, thrilling trip' and awarded it 94%, calling it a faithful adaptation of the PC version with the exact same level design, unlike the 32X version.^[27]Super Console described it as an amazing conversion for the SNES.^[28]

Electronic Gaming Monthly gave this version a score of 5.375 out of 10. Two of their reviewers said that it was "decent" but clearly inferior to other versions ofDoom, while the other two felt it to be a poor game even without comparing it to other versions. They particularly criticized that enemies at a distance are too pixelated to be seen, making it "seem like you are getting hit for no reason at all". They cited the "outstanding" music as the one strong point.^[25]Next Generation similarly complained that enemies are so pixelated at mid-distance or farther that they blend in with the backgrounds. They also criticized the graphics in general as requiring "constant squinting" to discern what is going on and called the controls "poor and sluggish." While acknowledging that creating a port of Doom for a last generation console at all was an impressive technical accomplishment, they concluded the port to be not worthwhile and gave it two out of five stars.^[20]GamePro instead stated that distant objects appear sharp and clear, and that it is objects which are close up which appear extremely pixelated. They gave the SNES version a generally negative assessment, saying that the game is almost unplayable due to the unresponsive controls.^[29]

Linden would later develop a cancelled port ofQuake for theGame Boy Advance as well as the PlayStation emulatorBleem!. On July 14, 2020, Linden released the source code for the port under theGPL-3.0-only license. AtQuakeCon 2024,Limited Run Games announced a "new and improved" version of the SNES port ofDoom developed with the involvement of Linden which boasts performance improvements, the inclusion of the Thy Flesh Consumed episode fromThe Ultimate Doom and circle strafing as well as other additions. The larger 4 MB cartridge will feature a new custom chip that exceeds the performance of the previous Super FX chips and the game will support rumble with a new compatible controller that will also be released alongside the game in 2025.^[30][31]

ThePlayStation version ofDoom was published byWilliams Entertainment and developed by its San Diego development division,Leland Interactive Media,^[32] and released on November 16, 1995. This version spent six months in development.^[33] It is one of the best selling versions of the game after the original PC version. It was re-released several times, first on the "Greatest Hits" range in the U.S., which requires that games have sold at least 150,000 copies there, and on the "Platinum Range" inPAL regions, which indicates that it sold over 600,000 copies in those territories.

Changes from the PC original include the removal of the "Nightmare" difficulty level, and the fact that progress is saved via passwords (given at the end of each level). The passwords also save ammo and health stats, but the numbers for them are rounded. This version features 59 levels in total; 23 levels from the PC version ofDoom (edited much like the Jaguar and 32X versions), both of the levels designed for the Jaguar version, six new levels designed by the Midway team, five levels fromThe Ultimate Doom's fourth episode, and 23 levels fromDoom II. Unlike the other 1990sDoom ports, all of the enemies from the PC version ofDoom are included. However, the Arch-vile monster fromDoom II is not present; according to one of the game's designers, Harry Teasley, this was because he had twice as many frames as any other monster, and the team felt that they "just couldn't do him justice" on the PlayStation.^[34] There is, however, one new monster, the Nightmare Spectre. According to Teasley, this was included to add variety, and to take advantage of the PlayStation's capabilities. Two playerdeathmatch and co-operative multiplayer modes are available on the PlayStation if two consoles are linked using the original Serial I/O port, and each console has its own controller andDoom disc inserted.

Many textures were reduced in size due to technical limitations. As a result, the mug shot appears to be different from the one in the PC version; in fact, it is the same animated sprite, but squashed in from the sides. A small selection of new graphics and visual effects were introduced. These include sector-based coloured lighting, an animated, flame-filled sky, and a new animation for the player's mug shot, which shows theDoomguy's head exploding if the player character isgibbed.^[33] For the first time, translucent Spectres are drawn without the cascade effect (including the darker-shaded Nightmare Spectres). The original music by Bobby Prince was replaced by a new score byAubrey Hodges. The sound effects and voice-overs were also completely redone by Hodges, and, in parts of certain levels, echo effects were added. All of the story text is cut, save for the ending and second intermission fromDoom II, the latter of which appears at the end ofUltimate Doom instead.

On October 1, 1996, a port containing levels fromMaster Levels for Doom II andFinal Doom was released for the PlayStation under the nameFinal Doom. The PlayStation version ofFinal Doom has thirteen levels fromMaster Levels for Doom II, eleven levels fromTNT: Evilution, and six levels fromThe Plutonia Experiment. Like the PlayStation version ofDoom,Final Doom uses passwords. Unlike the PlayStation version ofDoom, support for thePlayStation Mouse peripheral is available forFinal Doom.

The PlayStation version was met with critical acclaim, with critics concurring it to be by far the best console version of the game to date. Major Mike ofGamePro gave it a perfect score in all four categories (graphics, sound, control, and FunFactor), noting that it was not just a straight conversion but a drastically reworked and comprehensive edition with "enough new twists and turns to surprise even the most battle-wearyDoom player". He applauded the inclusion ofDoom II, the added levels, the much smoother graphics when compared to previous console ports, the clear sound effects, the "chilling" music, and the precise controls.^[35] A reviewer forMaximum found the port's most worthwhile aspects to be the huge number of levels, the use of the shoulder buttons for strafing, and the "vastly improved" audio. He scored it 5 out of 5 stars.^[36] A reviewer forNext Generation said the PlayStation version succeeded in "putting previous efforts for 32X, Jaguar, and especially Super Nintendo, to shame" with its high frame rate, impressive lighting effects, responsive control, deathmatch capability, and inclusion ofDoom II and levels fromUltimate Doom. He complained that the walls are "sticky" and that he was feeling burnt out on reviewing ports ofDoom, and gave it four out of five stars.^[37]Next Generation's 1996 overview of PlayStation games raised the score to a perfect five stars.^[38]IGN gave it a 7 out of 10, citing the high frame rate, impressive lighting effects, use of the PlayStation Link Cable, and inclusion ofDoom II content. However, they criticized that the game was becoming old (the review was published a full year after the PlayStation version was released).^[39]GamePro awarded it Best PlayStation Game of 1995.^[40]

The 3DO version was published by 3DO and developed byArt Data Interactive, with assistance from Logicware, and was released in 1996.^[41] It features the same level set as the Atari Jaguar version, as well as the same auto-save feature, but lacks multiplayer modes. This version runs in a small screen at a low frame rate, though it includes the option to shrink the screen size further, which allows the game to run faster and smoother. It lacks some effects found in other versions but has an updated soundtrack that features remixed and original music. The Cyberdemon and Spider Mastermind are missing, though the Spectre (which is absent from the Jaguar, SNES, and 32X versions) is included.

The 3DO version was originally a more ambitious project, intended to surpass the PC version, but after it was mired indevelopment hell for two years, programmerRebecca Heineman was contracted to create a basic port in ten weeks.^[42] According to Heineman, the CEO of Art Data Interactive had no idea of how game development worked and assured her that the project was already well underway and just needed some fine tuning. Heineman then found that the CEO of Art Data had grossly underestimated how much work it would actually take to develop the game, boasting about brand new levels, enemies and weapons in the press when all he had were mock-up art assets. Heineman acquired the PC and Jaguar source code forDoomstraight from id Software and created a quick-and-dirty conversion.^[43] Due to this tight time constraint, porting over the soundtrack was not practical, so the score was re-recorded for the port by the CEO of Art Data Interactive and his band.^[44] Full-motion video cutscenes were also planned to take advantage of the 3DO's media streaming capabilities and increased CD-ROM storage medium, but these never came to pass. Heineman released some screenshots of the planned FMV cutscenes, but claims they were only stills made to lure investors.^[45] In December 2014, the source code for the 3DO version was released to the public under theMIT license.^[46]

Maximum thoroughly panned this version for its lack ofPAL optimization, large borders, choppy frame rate even on the smallest possible screen size, bland color palette, music which is lacking in atmosphere, and load times. They added that the frame rate and slowdown make the game too easy: "When large amounts of monsters arrive to beat the crap out of you, the game slows down to such an extent that you have ages to line up your shots and fire." With their only praise being for the intuitive and effective control configuration, they gave it one out of five stars.^[47]GamePro called it "the worst console version ofDoom so far", chiefly due to the choppy frame rate.^[48]

Based on the PlayStation version,Doom was ported to the Sega Saturn byRage Software and published byGT Interactive in 1997.^[49] Though containing the same levels, enemies, structures, and most of the sounds effects and music from the PlayStation version, this port suffers a number of differences and setbacks; the frame rate is significantly lower, the animation is slower, the echoed sound effects and sector-based lighting are missing, the Spectre and Nightmare Spectre monsters do not have the translucent textures and instead are drawn in see-through sprites of regular Demon enemies, and the animated fiery skyline in certain levels is gone, usually replaced withDoom II's city skyline. The lead programmer on this port, Jim Bagley, later said that he originally programmed a hardware-accelerated engine that would have performed on par with high-end PCs of the time, but id Software disallowed usage of the engine due to texture distortion caused by the rendering process, resulting in the final version using an entirely software-based renderer. John Carmack of id Software explained that they disallowed the engine because "I hated affine texture swim and integral quad verts."^[50]

This version is compatible with the Saturn analog controller^[51] and the Saturnmouse. However, the mouse cannot be used to strafe, access the automap, or manually change weapons (though as in all versions ofDoom, the player character automatically equips a weapon when it is first acquired and switches to a different weapon if the current one is depleted of ammunition).

The packaging for the U.S. release contains a few errors, such as the game screen shots on the back actually being from the PC version ofFinal Doom, and it claims to be "deathmatch ready", when it is in fact only one player (the deathmatch and cooperative multiplayer modes are only in the Japanese and PAL releases, despite the fact that the Saturn link cable needed to play these modes had not been released in PAL regions^[52]).

The Saturn port was met with a generally negative reception, with most reviewers considering it far below the quality of the PlayStation version. The most common criticisms were the low frame rate^[49][53][54] and lack of certain graphical elements seen in the PlayStation version.^[49][54] Reviewer fatigue withDoom ports also continued to play a role;Jeff Gerstmann, rating it a 3.1 out of 10 inGameSpot, commented that "If I see one more Doom game released on any platform, I'm going to hunt down the people responsible and kill them slowly."^[53]Sega Saturn Magazine awarded the port a score of 56%, with the reviewer describing it as a "breath-takingly bad conversion of a classic game", judging the game's poor performance to be inexcusable considering the Saturn's 2D rendering capabilities, and feeling that even the earlier 32X and Jaguar versions played much better, despite being released on less powerful systems.^[49]GamePro was less outraged, judging that while the Saturn port is clearly inferior to the PC and PlayStation versions, it is enjoyable in absolute terms and "successfully mimics the PlayStation version in most categories - with the crucial exception of speed."^[54]

TheGame Boy Advance version ofDoom was developed by David A. Palmer Productions and was released on November 5, 2001,^[55] and featured a level set identical to the Jaguar version, as the engine is actually a port of it.^[56]

Both GBA ports feature the same multiplayer functionality as the PC version. These were the first ports ofDoom on ahandheld device. BothDoom andDoom II received a much larger amount ofcensoring than other ports (monstersbleed green instead of red, and many more disturbing sprites such as corpses impaled on spikes are removed),^[1] resulting in a Teen rating from theESRB.^[57]

Co-developed by id Software andVicarious Visions and launched on April 4, 2005, theDoom 3 Limited Collector's Edition features ports ofThe Ultimate Doom andDoom II, including a two- to four-player split-screen multiplayer mode.^[58] The expansion packResurrection of Evil also containsThe Ultimate Doom andDoom II, as well asMaster Levels for Doom II.^[59]

On September 27, 2006,Doom was released for download on theXbox Live Arcade for theXbox 360. The game has all 4 episodes fromThe Ultimate Doom plus online cooperative and deathmatch modes throughXbox Live. Like the Xbox version, it does not include any of the console-only levels which appeared in earlier ports. Supports 11 screen sizes, and has higher graphics resolution than any earlier console port. Due to a bug, the music plays at a slower speed. This port, programmed byNerve Software, also creditsVicarious Visions and likely shares code with the Xbox version. There are no cheats in this version of the game.

In 2010, the game was pulled from theXbox Live Marketplace becauseActivision, the game's publisher, no longer had the rights to maintain the game on the Marketplace, but as of January 20, 2012, it has been republished byBethesda Softworks,^[60][61] the same company that published the Xbox Live Arcade version ofDoom II: Hell on Earth.

Both games are backwards-compatible with theXbox One and can be purchased from the Xbox Store. They are also downloaded if the disc forDoom 3: BFG Edition is inserted into the console in lieu of the pack-in versions of the games included with that title, though the disc is required to play. They were also offered as a preorder incentive forthe 2016 reboot.

Doom 3: BFG Edition containsThe Ultimate Doom andDoom II: Hell on Earth. Later,Doom Classic Complete was released on thePlayStation Network which includesThe Ultimate Doom,Doom II: Hell on Earth,Master Levels for Doom II, andFinal Doom, the last two appearing for the first time in their entirety on a console.

Doom andDoom II were released forPlayStation 4,Nintendo Switch,Xbox One,Android andiOS on July 26, 2019, duringQuakeCon, in honor of the franchise's 25th anniversary.^[62]

Bethesda received criticism for allegations that it included additionaldigital rights management in this version, as the initial releases required that users sign into a Bethesda.net account in order to play. Bethesda later stated that this was not intended to be mandatory, but an optional link to receive rewards on the service's "Slayers' Club" program forDoom, and that the mandatory login would be removed in a patch.^[63][64] This initial release for Doom 1 and 2 in the 25th anniversary release was also plagued with uneven pixels, incorrect aspect ratios (no option for 4:3), incorrect lighting position, and the music not matching the original DOS release version.^[65] On January 9, 2020, Bethesda released an announcement that Doom 1 and 2 will have a patch and update fixing the problems that plagued Doom 1 and 2's initial release. Updates including quick saves, support for 60 frames per seconds, 4:3 aspect ratio support, and support for add-ons (such asFinal Doom and "No rest for the Living"). On March 6, additional updates and patches came out for Doom and 1 and 2 featuring audio improvements, quality of life features and minor performance optimization.^{[66][67][68][69]}

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An official port ofDoom, under the titleDoom Classic was released in 2009 for iOS devices.^[70]Doom Classic iOS is one of the few official ports handled by formerId Software developerJohn Carmack himself,^[71] and is based on thePrBoom source port.

This version ofDoom has since been replaced by the 25th Anniversary version on the iOS App Store, due toDoom Classic not being updated with support for versions of iOS past iOS 11, due to Apple dropping support for 32 bit apps in iOS 10

Doom has been ported to theRaspberry Pi Pico by Graham Sanderson.^[72][73] The gameplay has every single detail found in the original game, and the video output is the authentic 320 × 200 pixels. The PIO (Programmable Input/Output) of the Pico was used to emulateVGA. The sound effects are in stereo. Multiplayer mode is also supported. (Up to 4 players over an i2c network)

Official plans to portDoom to the WebTV Plus and EchoStar DishPlayerinternet appliances, both utilizing a custom-made enhancement chip called the SOLO that would allow for more advanced graphics capabilities, were made known as early as late 1998 and 1999 respectively. While it only got an official release for DishPlayer units in 1999 alongside a port of the Netshow version ofYou Don't Know Jack and Solitaire,^[74] all made to demo the technological capabilities of the WebTV hardware, a port made for original WebTV Plus units that wasn't publicly released was discovered by its dedicated hacking scene around August 1998, which could only be downloaded from connecting to an internal WebTV service. The WebTV and DishPlayer ports were likely developed by Prolific Publishing, Inc.^[75] Ports for both devices were stripped-down versions of the full game, only containing 4 episodes, most likely due to the fact they were made solely as demos. The ports also made use of the WebTV keyboard for control input.^[76]

Because there was no concern to know how the boxes stored information on the hard disks when either port was made known, and in the case of the WebTV Plus port, copies were supposedly subject to being wiped from the hard disks on command from the WebTV service,^[77] both the WebTV Plus and DishPlayer ports remained unpreserved for some time. Since then though, there have been a couple attempts to preserve the game and allow it to be playable after the service's discontinuation. Recently, unmodified versions of WebTV Plus and DishPlayer Doom, alongside other WebTV games, have since been publicly archived online. From 2014 to 2021, though, both the DishPlayer and WebTV Plus versions of the game were only available to play through a custom WebTV firmware image named "HackTV", which was done by WebTV hackers MattMan69 and eMac. These efforts did not intend to preserve the ports in their original forms, however, as the WebTV Plus version in particular is known to have modifications to carry the "HackTV" branding on the splash screen.

Doom was officially ported to theHusqvarna Automower NERA in April 2024, playable with the control wheel thanks to the LCD screen.^[78][79] This port was originally developed during the 2023Winter Dreamhack.

InDoom Eternal, the originalDoom andDoom II games are available to play in the Doom Slayer's PC in the Fortress of Doom. Both need to be unlocked, the first by collecting all of the in-game cheat codes, and the second one via the password FLYNNTAGGART.^[80]

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This is a list of unofficial ports of theengine used to runDoom, referred to assource ports, that expand upon the engine's capabilities, alter how the game being run is played, or make it compatible with other operating systems. They have received substantial notable coverage.

There are hundreds of source ports known to have existed.^[81] TheDoom engine'ssource code was released to the public on December 23, 1997. AlthoughDoom was originally created for DOS, the original source release was for the subsequentLinux version, due to the use of a proprietary sound library in the DOS version.^[82] The original purpose of source ports was cross-platform compatibility, but shortly after the release of theDoom source code, programmers were correcting old, unaddressedDoom bugs and deficiencies in their own source ports, and later on introducing their own modifications to enhance game features and alter gameplay.

The source code was originally released under a proprietary license that prohibited commercial use and did not require programmers to provide the source code for the modifications they released inexecutable form, but it was later re-released on October 3, 1999, under theGPL-2.0-or-later license^[83] after requests from the community.^{[citation needed]}

The following diagram depicts a simplified family tree ofDoom source ports (Information may be outdated).

DOSDoom is the firstDoom source port for DOS, launched within a day after the release of the Linux game's source code in 1997. It was created by Chi Hoang, who took the original Linux release of theDoom source code and ported it back to DOS.^[84] It evolved to include several new features, which were previously unseen at the time shortly after the release of the originalDoom source code, including translucency, high resolution and color rendering, and vertical aiming.^[85]

Doom Legacy is a source port originally written as a fork of DOSDoom, introducing mouse-look, jumping, a console, 32-player deathmatch, skins, and, later, native Windows, Linux, andMac OS X ports. It has also evolved to support many Boom features and3D acceleration. Later releases include additional features, notably the ability for levels to contain floors directly over floors in December 2000, meaning levels are not required to be strictly 2D from a top-down perspective as they were in the originalDoom engine games. It has its own scripting language, called Fragglescript.

One of the first source ports, glDoom was an attempt to bringOpenGL accelerated graphics support to theDoom engine, developed by Bruce Lewis. The project was canceled in 1999 after an accident in Lewis's home, in which the hard drives storing the project's source code crashed, destroying it. Concurrently, backup tapes storing the code were also destroyed.^[86] This has been cited by id Software as one of the reasons why it republished the source code under a free license, as it believed that incidents like that could be prevented by requiring developers to share their changes.^[87] In April 2010, however, Lewis rediscovered the glDoom sources in one of his deceased friend's hard drives.^[88]

Boom was aport for DOS of theDoom source code byTeamTNT. Boom fixed numerous software glitches and added numerous other software enhancements into the engine to such a degree that its additions have been incorporated into most modern versions ofDoom source ports (such as PrBoom+, ZDoom and Doom Legacy). The last update of Boom was released on October 22, 1998. In October 1999, Boom's source code was released.^[89] Further development of Boom as a source port was continued for DOS as MBF, for Windows as PrBoom, and for Linux as LxDoom. The latter two later merged as PrBoom and also took on many of the MBF features, so PrBoom's own successor, PrBoom+, is effectively the modern equivalent of Boom. Modifications ofDoom that use Boom are referred to as "Boom-compatible", however that usually means "PrBoom+" due to further limits being removed in PrBoom+.

The Eternity Engine is a cross-platform source port licensed under theGNU General Public License. It was first released on January 8, 2001, as version 3.29 beta 1. It was originally meant to power aDoom total conversion, but after that project went on hiatus (eventually being cancelled in 2006), the engine became the prime focus. The engine is based on Smack My Marine Up (SMMU). It includes such features as scripting, portals, polyobjects, andHeretic support.

Marine's Best Friend (MBF) is a DOS-based source port. It is based on Boom, and adds several new features including high resolution graphics, enhanced monsterAI,emulation of the pre-release beta versions ofDoom, and "helpers" that follow and help the player (specifically dogs, to which the name of the engine refers). It was developed by Lee Killough and is no longer updated. Its code was later used as the base of the source port Smack My Marine Up, which in turn was used to construct the Eternity Engine. Some of its code was also adopted in PrBoom. In August 2004, James Haley and Steven McGranahan ported Marine's Best Friend to Windows as WinMBF. WinMBF was last updated in January 2005.

Modder's Best Friend (MBF21) is a specification based on Boom and MBF made in 2021, created to address bugs introduced in MBF and expand the engines capabilities while retaining the conservative vanilla feel of Boom/MBF. The name is not only a reference to the year in which it was developed, but also its compatibility level (complevel) for certain source ports that support it.

PrBoom is aDoom source port derived fromLinux andWindows ports of Boom and MBF that includes an optionalOpenGL renderer, as well as options allowing it to restore the behavior of earlier executables (such asDoom version 1.9, Boom, and MBF) in essential ways. A variation named PrBoom+ provides enhanced demo recording and viewing capabilities. PrBoom was used as the engine for id Software's official port for the iPhone,Doom Classic.^[90][91] The source port was packaged in theUbuntu Software Center as well asFedora'sRPM software repository alongsideFreedoom. PrBoom was last updated on November 9, 2008.

Although PrBoom and PrBoom+ are simpler than some otherDoom source ports, they are often preferred as staying relatively close to the behavior of the original games, and have gooddemo support. However, some of the bug fixes and behavior changes of other ports may unbalance how levels made for the original games play, giving players certain advantages or disadvantages.

On April 1, 2022,Doom Ray Traced was released; a PrBoom+ mod withray-tracing andDLSS functionality.^[92]

The Doomsday Engine is a GPLv2-licensed source port (incorporating the former jDoom, jHexen, and jHeretic) that runs onLinux,Mac OS X, andWindows.^[93] The source port also supportsHeretic,Hexen: Beyond Heretic andDoom II. Its hardware-accelerated engine supports 3D models, dynamic lighting,^[94] object and movement smoothing, shadows, and other features. It also includes XG line and sector types for editing extensions, as well as a built-in master server games browser (launcher).

Vavoom is a source port created by merging theDoom,Heretic, andHexen: Beyond Heretic source trees to create a unified executable. It also features portions of theQuake source code (used predominantly for networking and rendering), and was the first source port to supportStrife: Quest for the Sigil. It has been in development since September 1999, and was first released on June 14, 2000. Among its features are a true 3D polygonal engine with colored lighting and software, Direct3D and OpenGL renderers, freelook support, 3D floors, and support for Boom's extended attributes. The source port is packaged in theFedoraRPM software repository alongsidefree installers that grab theshareware levels for all the games used by the engine by default.

ZDoom is a source port launched forWindows on March 6, 1998, and laterLinux andmacOS. It supports Boom editing extensions^[95] plus all of the extensions made in the version of theDoom engine used inHexen: Beyond Heretic, as well as several other new features. It also supports other games that share theDoom engine.^[96] Unlike many other source ports, ZDoom cannot play demos recorded withVanillaDoom, including the intro demos found in the IWAD. The last version of ZDoom, was released in February 2016, and was officially discontinued on January 7, 2017. In the announcement, ZDoom's creator, Randi Heit, recommended using QZDoom or GZDoom instead.^[96]

GZDoom is a source port based on ZDoom that extends its feature set to include anOpenGL 3 renderer. It was released on August 30, 2005. GZDoom also boasts 3D floor support compatible with Doom Legacy and Vavoom, 3D model support, 360 degree skyboxes, and other features. Version 2.4.0 was the first version to be officially released on ZDoom.org alongside the release of QZDoom 1.3.0 on March 19, 2017.^[97]

Skulltag was one of the multiplayer-centricDoom ports based on (G)ZDoom.^[98] It added 32-player multiplayer and different game modes: standard types such asdeathmatch andcapture the flag, and other modes such as co-operative waves and invasion maps.^[99] Skulltag had support for 3D models and high-resolution textures. Skulltag received a final update on November 7, 2010, and was shut down on June 7, 2012.

Skulltag 98e was succeeded by Zandronum, which is made by the same developers after the original creator moved to another project. Zandronum was first released as version 1.0 on August 24, 2012. Zandronum improved support up to 64 players online per server and introducedLast Man Standing and other, more original game modes.^[100]

ZDaemon is an online multiplayer source port forDoom. It is a fork of another source port,Client/Server Doom orcsDoom, the first stable source port to allow playing on the Internet by usingclient/server network code (fromQuakeWorld).^[101] With ZDaemon, players create an account and can then easily connect to multiplayer servers with the included server browser (ZDaemon Launcher). The ZDaemon Launcher also features access to the ZDaemonIRC channel through their own client called "ZRC" (ZDaemon Relay Chat). To cut down on impersonation and spoofing, version 1.09 introduced in-game nick authentication, which allows players to use aliases (such as for clan tags), but only when they actually own the nick. ZDaemon also collects statistics from servers that have it enabled, as well as experience points, allowing players to level up as they play, though leveling up does not provide any in-game benefits.

Chocolate Doom is a source port forWindows,Linux,macOS,AmigaOS 4,^[102]MorphOS, and other modern operating systems that is designed to behave as closely as possible to the original DOS executables ("Vanilla Doom"), going so far as to duplicate bugs found in the DOS executables, including bugs that cause the game tocrash. This involves more than just leaving existing bugs in the source code. Several bugs present in the DOS version (for example, the sky bug inDoom II) were fixed by the time theDoom source code was released in 1997, so these bugs were recreated for Chocolate Doom. Other bugs present in Vanilla Doom were dependent on, for example, details of how DOS handles memory, or hardware drivers, which modern operating systems handle much more gracefully; bugs of this sort were carefully replicated where it was safe and useful to do so. In general, saved game files, configuration files, and demo files created by Chocolate should work identically with Vanilla, and vice versa. The first version of Chocolate Doom was released on September 7, 2005.

As Chocolate Doom is designed to behave as closely as possible to the DOS executables, it has no new core features, is not limit removing, does not support any higher screen resolutions, and caps itsframe rate to match the 35fps of Vanilla Doom. However, some peripheral features are introduced to help recreate aspects of the original gameplay experience which are not directly part of the Vanilla Doom executables themselves, or simply to make antiquated original features more usable today. For instance, it supports music playback using the standardMIDI interface of the host operating system, but also offersOPL2 and OPL3 emulation, which recreates how the MIDI tracks sounded on the most popularSound Blasteraudio cards available when Doom was released. It also supports sound effect playback via thePC speaker, if one is present, and can emulate the sound of one if not. It provides an emulation mode forNOVERT.EXE, a DOS mouseTSR that was commonly used with shooters such asDoom andWolfenstein 3D, but was not part of the games themselves. Where Vanilla Doom allows users to take screenshots using the long-obsoletePCX image file format, Chocolate Doom optionally allows screenshots to be saved in the modernPNG format instead.

Chocolate Doom is popular among players who prefer a strictly traditionalDoom experience, but also as a test engine forlevel designers, as Chocolate Doom crashes where Vanilla would crash and presents bugs in the same way as would Vanilla, allowing mapmakers and modders to test their designs for strict backward compatibility; for both gameplay and testing purposes Chocolate Doom obviates the need to run Vanilla Doom under DOS, or a DOS emulator. By default, it simulates the behavior of DOOM.EXE and DOOM2.EXE version 1.9 running underWindows 98 (DOS version 7.1), although it will simulate the executables fromThe Ultimate Doom orFinal Doom, as well as versions as early as version 1.666 (the engine version number at whichDoom II was released) if it detects their respective IWADs, and can also be made to simulate the behaviour of the executables under both DOS 6.22 andDOSBox, for cases where execution on those platforms yields different bug behaviour.

Crispy Doom is afork of Chocolate Doom, which features limit removal and numerous quality-of-life enhancements, such as increased display resolution and an unlocked framerate. It uses the same game engine as Chocolate Doom, but allows enhancements to be easily toggled on or off in a separate options sub-menu in a manner that preserves core Vanilla gameplay as much as possible. It is popular among players who want a fundamentally traditional "Vanilla-like"Doom experience but who may want a few modern niceties like a higher screen resolution and/or some major bug fixes, while also appealing to players who, for example, engage inspeedrunning or otherwise want to compete fairly against those playing Vanilla by making it trivial to disable any salient differences.

Various versions ofDoom exist for theAmiga computers, one well-known example of which is ADoom.^[103][104]

A port of PrBoom was written for the Nintendo DS. PWADs and DEH patches are supported, but only by creating a separate file with arguments to load them on startup. Wi-Fi network play is supported when using a PrBoom server set up on a PC.^[105]

DOOMD was a port released for FlashPoint Technology'sDigitaOS for digital cameras. The port is based directly on the 1997 source code release. BothDoom andDoom II IWADs are supported. Custom WADs are supported, but no selection interface has been implemented.^[106][107]

A hack allowed 5th generation iPods to run a port ofDoom.^[108] It is also possible to runDoom on iPods runningRockbox's Rockdoom plugin.^[109]

Two ports have been released to run onZune devices usingOpenZDK. One for the Zune HD, and the other for third generation Zunes and lower.^[110][111]

A source port to theTI-Nspire graphing calculators (specifically theNDless jailbreak software) was created, titled nDoom. It is a direct port of the originalDoom engine, and as a result supports all IWADs and PWADs that were designed for the original executable. Support forHeretic: Shadow of the Serpent Riders andHexen was added.^[112]

aoDOOM was a source port made for some ofArchos Gmini devices that runs an embedded version of ArchOpen.^[113] It supports all WADs and PWADs, including Doom 1 and Doom 2.^[114]

Another port from original CDoom made for DOS machines and c2Doom exclusively ported for Nokia Series 60 version 2 and 3 editions smartphones. Possibly this mod originated from Korea based upon the trailer that had been released on YouTube.

In 2025,Doom was ported to the AppleLightning toHDMI adapter, which was running a firmware vulnerable to thecheckm8 exploit.^[115]

TheseDoom source ports have the characteristic of running onvirtual machines such as theJava Virtual Machine orAdobe Flash while still being based on theDoom engine's source code. Due to the nature of the latter, some of these ports have opted for using automatic parsing of C code (such asAdobe Alchemy), while others have adopted a major rewrite.

Freedoom has been ported to theWorld Wide Web viaEmscripten andasm.js under the name "boon".^[116][117]

The originalDoom sources have been ported toWebAssembly.^[118]

In the past, there have been several unsuccessful attempts to produce aDoom source port in Java such as DoomCott^[119] or the Stark Engine,^[120] which were either abandoned or never gained enough functionality to be properly called source ports. The only active JavaDoom project as of 2010 is Mocha Doom,^[121][122] a pure Java implementation ofDoom with features similar to modernDoom source ports and direct compatibility with the original game data.

Doom has been re-implemented in C# by the Managed Doom project.^[123]

A mod was made forDoom 3 that allows the player to run the originalDoom using an in-game terminal. The mod, called "Terminal Doom", is based on the 1997 source code release, and constitutes an experiment onDoom 3's interactive surfaces. All retail and shareware releases ofDoom are supported by this port.^[124][125]

Doom was ported toHP-UX 10.20 on thePA-RISC platform, and included as an easter egg on HP (laterAgilent and nowKeysight)'s' 16700 family of PA-RISC basedlogic analyzers.^[126]

WiiDoom is a Wii port ofDoom using the open source PrBoom engine.^[127]

Doom was ported to theHoneywell Prestigethermostat.^[128] It is controlled with a controller connected to the USB port on the bottom, which was originally intended for software updates.

Toom is a HolyC source port ofDoom made forTempleOS systems. It features support for the originalDoom as well as multiple mods and add-ons including its sequelDoom II.^[129]

• Source port

• Interview with Harry Teasley (1998) by Doomworld
• An in-depth comparison of console, handheld and computer Doom games
• Doom atMobyGames

• Doom (franchise)
• Lists of video games by franchise

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