Valve Corporation, also known asValve Software, is an Americanvideo game developer,publisher, anddigital distribution company headquartered inBellevue, Washington. It is the developer of the software distribution platformSteam and the game franchisesHalf-Life,Counter-Strike,Portal,Day of Defeat,Team Fortress,Left 4 Dead andDota.

Valve Corporation

The lobby of Valve's former offices inBellevue, Washington
Formerly	Valve, L.L.C. (1996–2003)
Company type	Private
Industry	Video games Digital distribution
Founded	August 24, 1996; 28 years ago (1996-08-24) inKirkland, Washington, US
Founders	Gabe Newell Mike Harrington
Headquarters	Bellevue, Washington , US
Key people	Gabe Newell (president) Scott Lynch (COO)
Products	Video games Counter-Strike Day of Defeat Dota Half-Life Left 4 Dead Portal Team Fortress Hardware HTC Vive Steam Controller Steam Deck Steam Link Steam Machine Valve Index Software GoldSrc Proton Source Source 2 Source Filmmaker Steam SteamOS Valve Anti-Cheat VOGL
Total equity	US$10 billion[1] (2019)
Owner	Gabe Newell (>50%)[2]
Number of employees	336[3] (2021)
Subsidiaries	Valve S.a.r.l. Valve GmbH[4] Campo Santo
ASN	32590
Website	valvesoftware.com

Valve was founded in 1996 by the formerMicrosoft employeesGabe Newell andMike Harrington. Their debut game, thefirst-person shooter (FPS)Half-Life (1998), was a critical and commercial success and had a lasting influence on the FPS genre. Harrington left in 2000. In 2003, Valve launched Steam, followed byHalf-Life 2 (2004), theepisodic sequelsHalf-Life 2: Episode One (2006) andEpisode Two (2007), the multiplayer gamesTeam Fortress 2 (2007) andLeft 4 Dead (2008), the puzzle gamesPortal (2007) andPortal 2 (2011) and themultiplayer online battle arena gameDota 2 (2013).

In the 2010s, Valve released fewer games and experimented with hardware andvirtual reality (VR). They entered the hardware market in 2015 with theSteam Machine, a line ofgaming computers, which sold poorly, and released theHTC Vive andValve Index VR headsets. They returned to theHalf-Life series in 2020 withHalf-Life: Alyx, their flagship VR game. In 2022, Valve released theSteam Deck, a portable gaming system.

Valve uses aflat structure, whereby employees decide what to work on themselves. They develop games throughplaytesting and iteration, describing game design as a kind ofexperimental psychology. By 2012, Valve employed around 250 people and was reportedly worth over US$3 billion. Most of Valve's revenue comes from Steam, which controlled over half of the digital PC games market in 2011 and generated an estimated $3.4 billion in 2017.

Valve was founded in 1996 by the formerMicrosoft employeesGabe Newell andMike Harrington.^[5] Newell had spent the prior 13 years at Microsoft developingWindows,^[5] including theWindows 95 port ofDoom.^[6] Wanting to move onto a new venture using their shared wealth, Newell and Harrington founded Valve, L.L.C.^[7] inKirkland, Washington, about five miles from the Microsoft campus inRedmond, on August 24, 1996, Newell's wedding day.^{[8][9][5][10]} In a break from industry style of the time, Newell did not want a company name that suggested "testosterone-gorged muscles and the 'extreme' of anything".^[11] Alternative names considered by Newell and Harrington include Hollow Box, Fruitfly Ensemble and Rhino Scar.^[11][12]

Valve's first game wasHalf-Life, afirst-person shooter (FPS) with elements of horror.^[11] The development was aided by access to theQuake engine byid Software; Valve modified this engine into theirGoldSrc engine.^[5] After struggling to find a publisher, Valve eventually signed withSierra On-Line.^[5]

Half-Life was released in November 1998^[13] and was a critical and commercial success.^[14][15][16] With its realism,scripted sequences and seamless narrative, it had a lasting influence; according toIGN in 2014, the history of the FPS genre "breaks down pretty cleanly into pre-Half-Life and post-Half-Life eras".^[17]

Valve enlistedGearbox Software to develop threeexpansions forHalf-Life:Opposing Force (1999),Blue Shift (2001) andDecay (2001).^[5][18] In 1998, Valve acquired TF Software, a group that had made the popularTeam Fortressmod forQuake, and remade it for GoldSrc asTeam Fortress Classic in 1999.^[19] Valve released thesoftware development kit (SDK) for the GoldSrc engine, facilitating numerous user-created mods. They acquired the developers of one popular mod,Counter-Strike, to create a standaloneCounter-Strike game.^[5] Happy with Valve's success, Harrington sold his stake in Valve to Newell in 2000.^[20][11]

Valve's publishing agreement meant Sierra owned theHalf-Lifeintellectual property and held exclusive publishing rights to future Valve games. In 2001, Valve renegotiated by threatening to cease game development and develop other software, using an offer of a partnership fromAmazon to create a digital storefront as a bargaining chip. After the agreement with Sierra was amended, Valve gained theHalf-Life intellectual property and online distribution rights for its games.^[21][22]

In 2003, Valve moved toBellevue, Washington, andreincorporated as Valve Corporation.^[5] In 2010, the office moved to a larger location in Bellevue. In 2016, Valve signed a nine-floor lease in theLincoln Square complex in downtown Bellevue, doubling the size of its offices.^[23]

Valve began developingHalf-Life 2 six months after the release of the firstHalf-Life, using its new in-house engine,Source.^[20] With advancedphysics systems and an increased focus on story and characters, it received critical acclaim upon its release in 2004. By 2011, it had sold 12 million copies.^[24]

In 2002, Valve launchedSteam, a digital storefront and delivery platform.^[25][26] Steam initially offered only Valve games, and was mandatory to installHalf-Life 2, but became a publisher of third-party games.^[27] As Valve became its own publisher via Steam, it transitioned to aflat organization. Outside of executive management, Valve does not have bosses and uses anopen allocation system, allowing employees to move between departments at will.^[28][29]

After having taken five years to developHalf-Life 2, Valve moved toepisodic development, planning to release shorter games more frequently.^[30]Half-Life 2: Episode One, the first in a planned trilogy of episodicHalf-Life 2 sequels, was released in 2006.^[31]Episode Two followed in 2007, alongside the multiplayer gameTeam Fortress 2 and the puzzle gamePortal, developed from the student projectNarbacular Drop.^[32] In January 2008, Valve announced the acquisition ofTurtle Rock Studios,^[33] which was renamed Valve South.^[34] Turtle Rock developedLeft 4 Dead andLeft 4 Dead 2 while associated with Valve. Turtle Rock Studios spun out of Valve again in March 2010.^[35]Forbes estimated that Valve had grossed $70 million in 2005.^[36]

In 2009, Valve hiredIceFrog, the developer ofDefense of the Ancients, aWarcraft III mod.^[37] IceFrog led the development of a sequel not associated with theWarcraft elements,Dota 2, released in 2013.^[38] AlongsideDota 2 in 2011, Valve startedthe International, an annualesports tournament forDota 2 with a prize pool supported by Valve and funds from microtransactions frombattle passes purchased by players.^[39] Valve releasedPortal 2 in April 2011.^[40] As with the originalPortal, Valve employed aDigipen student team to help develop it; the team behindTag: The Power of Paint implemented the new gel gameplay.^[41]

TheScreen Digest analyst Ed Barton estimated Valve's 2010 revenue to be in the "high hundreds of millions of dollars".^[23] As of 2011, Valve had an estimated worth of $2 to 4 billion and employed 250 people; according to Newell, this made it more profitable per employee thanGoogle orApple. Most of Valve's revenue came from Steam, which controlled 50 to 70% of the market for downloaded PC games in 2011.^[36]

By 2011, Valve had replaced episodic development with a platform-oriented approach, whereby games such asLeft 4 Dead 2 andTeam Fortress 2 were continually updated through Steam updates.^[30] In June 2012, Valve hired the economistYanis Varoufakis to study the online economies of their games.^[42] That December, Valve acquired Star Filled Studios, a two-person studio, to open a San Francisco office.^[43] Valve closed the office in August 2013 when they decided it had little benefit.^[44] At the 2013D.I.C.E. Summit, Newell announced that he and the film directorJ. J. Abrams were collaborating to produce aHalf-Life orPortal film, as well as a possible game.^[45]

In the 2010s, Valve released fewer games and invested in hardware development. Newell intended to make Valve more likeNintendo, which develops games in tandem with hardware, allowing them to create innovative games such asSuper Mario 64.^[46] Valve initially focused onaugmented reality, but in 2013 Newell laid off many staff to focus onvirtual reality (VR).^[46] In 2015, Valve released theSteam Machine, a line ofgaming computers, which sold poorly.^[46] Media commentators speculated that Valve's transition to service provider with Steam, which generated an estimated $3.4 billion in 2017, had driven it away from game development.^[47]

Valve canceled games includingnumerousHalf-Life projects (includingEpisode Three),Left 4 Dead 3, aSoulslike game, and avoxel-based game,A.R.T.I. Additional VR projects includedSimTrek, developed by members of theKerbal Space Program development team, and a new VR device, Vader, that was determined to be too costly for consumers.^[48][49] According to the designerRobin Walker, the abundance of projects that failed to gain traction, with no shared vision, damaged morale.^[46] Many players grew frustrated in anticipation of a newHalf-Life game.^[50]

Valve announced theSource 2 engine in March 2015 and portedDota 2 to it that September.^[51][52] That year, Valve collaborated with the electronics companyHTC to develop theHTC Vive, aVR headset released in 2016.^[53] Valve experimented with VR games, and in 2016 releasedThe Lab, a collection of VR minigames.^[54]

Valve recognized that many players wanted a more ambitious VRAAA game, and began exploring the development of a major VR game.^[54] They developed several prototypes, with three further VR projects under development by 2017.^[55][56] Finding that the portal systems of their puzzle seriesPortal were disorienting in VR, they settled onHalf-Life.^[53] Walker said thatHalf-Life 3 had been a "terrifyingly daunting prospect", and the team saw VR as a way to return to the series.^[53]

Full development of a VRHalf-Life game started around late 2016, with the largest team in Valve's history.^[57][58] Valve acquired the 3D audio software developer Impulsonic in January 2017.^[59] In April 2018, Valve acquired the independent developerCampo Santo, known for the 2016 adventure gameFirewatch. Campo Santo planned to develop its own games under Valve, though they initially helped developHalf-Life: Alyx.^[60][61]

In November 2018, Valve releasedArtifact, adigital collectible card game based onDota 2, with design byRichard Garfield, the creator ofMagic: The Gathering.Artifact had unusual pay-for mechanics to acquire new cards, and did not draw a large playerbase, losing 95% of players months after release.^[62] In April 2021, Valve abandoned efforts to reboot the project, saying they had not found enough interested players to justify development.^[63] In June 2019, Valve released its second-generation VR hardware, theValve Index.^[64] They also releasedDota Underlords into early access, anauto battler based on aDota 2 community-created modeDota Auto Chess.^[65]

In March 2020, Valve releasedHalf-Life: Alyx, a VR game.^[66] It received acclaim^[67] and was described as VR's firstkiller app.^{[68][69][70][71]} Newell said in January 2021 that the success ofAlyx created desire within the company to develop more games, and that several were under development.^[72] Valve collaborated withNetflix forDota: Dragon's Blood, an animated television series based onDota, which premiered in March 2021.^[73] In February 2022, Valve released theSteam Deck, a portable game system that runs onSteamOS.^[74] In September 2023, Valve releasedCounter-Strike 2. It received generally favorable reviews, but player reception was mixed.^[75][76]

In 2024, Valve began beta-testing a new multiplayer game,Deadlock, a combination of ahero shooter andMOBA.^[77] In September, staff members from Hopoo Games, developers ofRisk of Rain, announced that they had been employed at Valve.^[78] According to a report byForbes Australia published in December 2024, Valve had an annual revenue of $5 billion by 2023, with a 40% profit margin. Steam accounted for around 60% of this revenue, double that of 2019.^[79]

Initially, Valve used a hierarchical structure more typical of other development firms, driven by the nature of physical game releases through publishers that required tasks to be completed by deadlines.^[80] However, as Valve became its own publisher via Steam, it found the hierarchical structure was hindering progress.^[57]

After completingHalf-Life 2, Valve transitioned to aflat organization; outside of executive management, Valve does not have bosses, and uses anopen allocation system.^[81][82] Valve's marketing manager, Doug Lombardi, said: "Nobody writes a design doc and hands it to somebody and says, 'you go build this'. It's the teams that are coming up with the ideas and pushing in the directions that they want to take the product."^[83] This approach allows employees to work on whatever interests them, but requires them to take ownership of their product and mistakes they may make, according to Newell. Newell recognized that this structure works well for some but that "there are plenty of great developers for whom this is a terrible place to work".^[80] Following the difficult development ofHalf-Life 2, Newell said he became "obsessed" with improving Valve'swork-life balance.^[30]

Although Valve has no bosses, some employees hold more influence due to seniority or relationships. De facto project leads became "centralized conduits" for organization and sharing information, and decisions are made collectively. Valve uses a process named Overwatch to gather feedback from senior members, which teams may use or ignore.^[46][30]

The success of Steam means that Valve is not dependent on the success of its games.^[84] The lack of organization structure has led to project cancellations, as it can be difficult to convince other employees to work on them.^[85][86][87] In 2020, Valve acknowledged that this made it difficult to gather momentum and had slowed their output during the 2010s.^[88] Their VR projects andHalf-Life: Alyx became a turning point, setting short-term studio-wide goals to focus the company. According to Walker, "We sort of had to collectively admit we were wrong on the premise that you will be happiest if you work on something you personally want to work on the most."^[57]

In January 2023,People Make Games released a report on Valve's corporate structure and culture, based on interviews with several current and former employees. They found that Valve's flat structure andstack-ranking compensation system created a poor release record and a lack of employee diversity.^[84][89] In 2024,Forbes estimated that Newell owned 50.1% of Valve, with the rest owned by employees.^[90]

As part of Wolfire Games' lawsuit over Steam policies, case documents revealed details related to Valve's employee structure. Starting with 60 employees in 2003, Valve grew to around 350 employees around 2012 and remained around this number through 2021. Up through 2010, the employees were categorized in three areas, administration, game development, and Steam development; in 2011, a hardware development category was added.^[91]

Valve time is an industry term used jokingly with game releases from Valve, used to acknowledge the difference between the "promised" date for released content stated by Valve and to the "actual" release date; "Valve Time" includes delays but also includes some content that was released earlier than expected. Valve has acknowledged the term, including tracking known discrepancies between ideal and actual releases on their public development wiki^[92] and using it in announcements about such delays.^[93][94] Valve ascribes delays to their mentality of team-driven initiatives over corporate deadlines.^[95]

Valveplaytests its games extensively from the beginning of development,^[96] and iterates based on the results.^[46] Its website states: "We believe that all game designers are, in a sense,experimental psychologists."^[46] The Valve writerChet Faliszek said he initially blamed testers when they failed to engage with designs as expected, but changed his mind when multiple testers had the same problem: "By the third or fourth time, all of a sudden you're realizing, 'I'm an idiot. This is pretty obvious this doesn't work. It's not their fault, it's our fault.'"^[96] He gave an example from the development ofLeft 4 Dead, wherein atexture change caused every tester to miss a ladder and become stuck.^[96]

Walker said playtesting helped Valve maximize the experience for players. For example, when something exciting occurs by chance during a playtest, the developers attempt to have it occur for every player.^[97] Newell contrasted this approach to that ofWarren Spector, whose open-ended games are designed to be replayed with different outcomes: "You spend all of this time to build stuff that most players will never ever ever see ... If only one per cent of your customers see this cool thing that takes five per cent of your development budget, that's not a good use of resources."^[97]

Valve is the main developer and publisher of the single-playerHalf-Life andPortal games and the multiplayer gamesCounter-Strike,Team Fortress 2,Dota 2,Day of Defeat, andArtifact. Valve also published the multiplayer gameLeft 4 Dead and developed and publishedLeft 4 Dead 2. Unreleased and canceled Valve games include the fantasyrole-playing gameProspero andnumerousHalf-Life projects, includingEpisode Three.^[98] Valve worked withArkane Studios onThe Crossing, which was canceled in May 2009.^[99]

Valve announced Steam, itsdigital distribution service, at the 2002Game Developers Conference.^[100][101] It was launched in September 2003 and was first used to deliverpatches and other updates to Valve's online games.^[102][103]

On August 1, 2012, Valve announced revisions to the Steam Subscriber Agreement (SSA) to prohibitclass actionlawsuits by users against the service provider.^[104][105] By July 2014, there were over 3,400 games available on Steam, with over 150 million registered accounts by January 2018.^[106][107]

Alongside these changes to the SSA, the company also declared publicly the incorporation of ValveS.a.r.l., a subsidiary based inLuxembourg.^[104][105] Valve set up a physical office inKirchberg, Luxembourg. According to Valve's project manager Mike Dunkle, the location was chosen for eCommerce capabilities and infrastructure, talent acquisition, tax advantages and central geographic location – most major partners are accessible, 50% within driving distance.^[108]

Valve S.a.r.l. was used to sell games to UK users to avoid paying the full 20%value-added tax (VAT).^[109] Thetax loophole was expected to close on January 1, 2015.^[110] In December 2015, the French consumer groupUFC Que Choisir initiated a lawsuit against Valve for several of their Steam policies that conflict or run afoul of French law. One of the reasons was for using the tax loophole.^[111] Valve S.a.r.l. ceased business on January 1, 2017, with the main company taking over EU sales again.^[112] In August 2017, Valve announced that Steam had reached over 67 million monthly and 33 milliondaily active users on the platform.^[113]

Newell has been critical of the direction that Microsoft has taken with making Windows aclosed architecture similar to Apple's products, and has stated that he believes that the changes made in Windows 8 are "a catastrophe for everyone in the [personal computer] space".^[114] Newell identified the open-source Linux platform as an ideal platform for Steam and said the only thing holding back its adoption is the lack of games.^[114]

In 2012, Valve announced that they were working on a console-PC hybrid for the living room, dubbed by media as the "Steam Box".^[115][116] A precursor to such a unit is SteamOS, a freely available Linux-based operating system that builds upon the Steam client functionality that includes media services, live streaming across home networks, game sharing within families, and parental controls. SteamOS was officially announced in September 2013 as the first of several announcements related to the Steam Machine platform^[117] as well as their unique game controller.^[8] In May 2014, Valve announced that the company's own SteamOS-powered Steam Machine would be delayed until 2015 due to problems with the game controller.^[118] In 2015,Alienware,ZOTAC, andCyberPowerPC launched their versions of the Steam Machine. By June 2016, fewer than half a million had been sold.^[119] While the Steam Machine line has been effectively canceled, Valve continued to manufacture and sellSteam Controllers until late November 2019,^[120] and publishes both mobile apps and software for theSteam Link, allowing in-home streaming.

At theGame Developers Conference in March 2015, Valve and Taiwanese electronics companyHTC unveiledSteamVR and theHTC Vive—avirtual reality platform and avirtual reality headset. The platform would be distinguished by its "Lighthouse" motion tracking system, where sensors on the headset and its includedmotion controllers read the position of two base station devices mounted in the play area. This would allow for "room-scale" VR experiences, where the player would not be required to remain in a stationary position in front of a camera and would be able to freely walk around the space.^[121][122]

In November 2017, Microsoft added beta support for theSteamVR service for Windows Mixed Reality headsets.^[123][124] In June 2019, Valve released their own VR headset, known as theValve Index, positioned as a higher-end device with widerfield of view and higher refresh rate. They were accompanied by updated motion controllers, which are strapped against the user's palms and have sensors for detecting input pressure and individual fingers.^{[125][126][127]}

Announced in July 2021, the Steam Deck is a hybrid game console similar to theNintendo Switch. It is primarily a handheld device that supports playing of Steam games, but through a separate dock unit, the console can output to an external monitor and use external power, networking, and USB accessories connected to the dock. The hardware is based on customizedAMD Zen 2 andRDNA 2 chipsets. Units started shipping in February 2022.

PowerPlay was a technological initiative headed by Valve andCisco Systems to decrease the latency for online games, announced in January 2000.^[128] It was described as a set of protocols and deployment standards at therouter level to improve performance. It was claimed that a player with 1000 msping was able to play against another player on aLAN connection with no noticeable disadvantage.^[129] Initially the protocol was to be released with PowerPlay 1.0 focusing onquality of service (QoS) and later a revision, PowerPlay 2.0 that would focus on functionality. Cisco and Valve intended to deliver a single dial-up service in Q1 2000 in the United States with a 30-day free trial with a bundled copy ofTeam Fortress modified to support PowerPlay.^[130]

The standard was to involve purchasing PowerPlay approved Cisco hardware and infrastructure that had adequate bandwidth and QoS standards that prioritize PowerPlay gaming packets at all others' expense. Newell conceded thatInternet service providers (ISPs) would bear the brunt of this expense: "The ISPs are going to need to spend a fair amount of money to be compliant with PowerPlay. But how they get that back is up to them. Some will have a tiered service, and some will just try to recoup their investment through reduced customer churn and customer acquisition."^[131] Despite never deploying the dial-up plan featuring PowerPlay 1.0, Valve announced in January 2001 that the standard had indeed been finalized.^[129] 12 months after its announcement, PowerPlay was abandoned.^{[citation needed]}

In July 2013, Valve announced Pipeline, anintern project consisting of ten high school students working together to learn how to create video game content.^[132] Pipeline serves to discuss and answer questions that teenagers often ask about the video game industry,^[133] and see if it is possible to train a group of teenagers with minimal work experience to work for a company like Valve.^[133] The latter purpose breaks Valve's tradition of employing experienced developers, as the company is not good at "teaching people straight out of school".^[133]

Between 2002 and 2005, Valve was involved in a complex legal dispute with its publisher,Vivendi Universal Games (under Vivendi's brandSierra Entertainment). Valve had entered into a publishing agreement with Sierra to releaseHalf-Life and subsequent games in 1997, with the contract giving Sierra someintellectual property (IP) rights to Valve's games. After Valve began development ofHalf-Life 2, it agreed a new contract with Sierra in 2001, removing these rights from Sierra and giving Valve some rights for digital distribution.^[134] Internally, Valve started work on Steam as a means to digitally distribute these games, and first revealed this project at the March 2002Game Developers Conference.^[134]

By August 2002, Valve had found that Sierra was distributing copies of their games toInternet cafes against the terms of their contracts and filed a lawsuit against Sierra and Vivendi. In addition to claims ofcopyright infringement, Valve asserted that Sierrabreached contract by withholding royalties and delaying the release ofCounter-Strike: Condition Zero until after the holiday season. Vivendi and Sierra countersued, stating that Valve had misrepresented their position in the revised 2001 contract since they had been working on Steam at that point as a means to circumvent the publishing agreement. Vivendi soughtintellectual property rights toHalf-Life and a ruling preventing Valve from using Steam to distributeHalf-Life 2.^[134]

On November 29, 2004, JudgeThomas Samuel Zilly of theU.S. District Court for the Western District of Washington ruled in favor of Valve. The ruling stated that Vivendi Universal and its affiliates (including Sierra) were not authorized to distribute Valve games, either directly or indirectly, through cyber cafés to end users forpay-to-play activities pursuant to the parties' publishing agreement. In addition, Judge Zilly ruled that Valve could recover copyright damages for infringements without regard to the publishing agreement's limitation of liability clause.^[135] Valve posted on the Steam website that the companies had come to a settlement in court on April 29, 2005.^[136]Electronic Arts announced on July 18, 2005, that they would partner with Valve in a multi-year deal to distribute their games, replacing Vivendi Universal.^[137] As a result of the trial, the arbitrator also awarded Valve $2,391,932.^[138]

In April 2009, Valve suedActivision Blizzard, which acquiredSierra Entertainment after a merger with its parent company,Vivendi Universal Games. Activision had allegedly refused to honor theValve v. Vivendi arbitration agreement. Activision had only paid Valve $1,967,796 of the $2,391,932 award, refusing to pay the remaining $424,136, claiming it had overpaid that sum in the past years.^[138][139]

Defense of the Ancients (DotA) was a landmarkmod first released in 2003 that created the basis of the genre ofmultiplayer online battle arena (MOBA). It was originally developed by Kyle Sommer (who goes by the aliasEul) withinBlizzard Entertainment'sWarcraft III: Reign of Chaos via itsworld editor, and spawned several similar efforts, notablyDotA-Allstars. While there had been several that contributed toDotA-Allstars, the project was managed primarily bySteve "Guinsoo" Feak, and later by "IceFrog". IceFrog was eventually hired by Valve in 2009, with the rights to theDotAintellectual property being sold to Valve the following year. Eul was also hired into Valve by 2010.^[140] Valve then subsequently filedtrademarks towards a sequel toDotA, titledDota 2. DotA-Allstars, LLC, a group of former contributors to theDotA-Allstars project, filed an opposing trademark in August 2010 to contest Valve's claim it owned the property rights.^[141]

DotA-Allstars, LLC was eventually acquired by Blizzard to start development ofBlizzard All-Stars. Blizzard took over the trademark challenge. TheUnited States Patent & Trademark Office initially ruled in Valve's favor. By this point,Riot Games had hired Guinsoo to help develop their own MOBA,League of Legends. As with IceFrog, Feak transferred his rights to theDota property to Riot, who in turn sold those to Blizzard. Blizzard filed a lawsuit against Valve to challenge Valve's ownership, pitting the rights assigned through IceFrog to Guinsoo at odds.^[142] The caseBlizzard Entertainment v. Valve Corporation was settled out of court in May 2012; Valve retained the right to useDota commercially, while Blizzard reserved the right for fans to useDota non-commercially.^[143] Blizzard changed the names of its own projects to remove theDota term, and renamedBlizzard All-Stars asHeroes of the Storm. Valve'sDota 2 was released in 2013.^[144]

In 2014, mobile developers Lilith and uCool released their gamesDota Legends andHeroes Charge, respectively. Both were influenced byDota and the sequels. In 2017, Valve and Blizzard took joint action against these companies, citing copyright issues related to theDota names. uCool argued that theDota games were acollective work and could not be copyrighted by anyone in particular, but the presiding judge,Charles R. Breyer, felt that, due to the trio's actions as maintainers of theDota mods, they had a rightful copyright claim to this. Separately, Lilith and uCool argued that Eul had, in a forum post from September 2004, assigned anopen-source copyright license toDota, which would make Valve and Blizzard's copyright claims void. The case was later heard by a jury.^[140]

TheAustralian Competition & Consumer Commission (ACCC) announced it was taking action against Valve in 2014. On March 29, 2016, Valve was found guilty of breaching Australian consumer law because:^[145][146]

• Valve claimed consumers were not entitled to a refund for digitally downloaded games purchased from Valve via the Steam website or Steam Client (in any circumstances);
• Valve had excluded statutory guarantees and/or warranties that goods would be of acceptable quality; and
• Valve had restricted or modified statutory guarantees and/or warranties of acceptable quality.

During the prosecution of this case, Valve implemented a refund policy for Steam purchases, but the case still reviewed Valve's actions prior to the onset of the lawsuit. The court overseeing the case sided with the ACCC in assigning aA$3 million (aboutUS$2.1 million) fine against Valve in December 2016, as well as requiring Valve to inform Australian consumers of their rights when purchasing games from Steam.^[147] Valve appealed the court's determination that it "engaged in misleading or deceptive conduct and made false or misleading representations about consumer guarantees", as well as seeking to appeal the fine, but the Australian higher courts rejected the appeals in December 2017.^[148] In January 2018, Valve filed for a "special leave" of the court's decision, appealing to theHigh Court of Australia.^[149] The High Court dismissed this claim in April 2018, asserting that Valve still was liable under Australian law since it sold products directly to its citizens.^[150]

Consumer rights groupUFC Que Choisir, based in France, filed a lawsuit against Valve in December 2015, claiming users should be able to resell their software.^[151][152] TheHigh Court of Paris ruled in favor of UFC Que Choisir in September 2019, stating that Valve must allow the resale of Steam games. Valve stated it will appeal the decision.^[153]

Valve was named as a defendant in two lawsuits in June and July 2016 related to third-party gambling sites that use the Steamworks API to allow betting with the virtual currency of cosmetic weapon replacement textures, better known as "skins", fromCounter-Strike: Global Offensive, which through these sites can be converted from or to real-world money. Both suits assert Valve aiding in underagedgambling.^[154] Valve subsequently stated it has no commercial ties with these sites, and that it would demand these sites cease their use of the Steamworks API as they violate the authorized use policies.^[155][156] In October 2016, the Washington State Gambling Commission required Valve to stop the use of virtual skins for gambling on Steam, stating they would face legal repercussions if they failed to co-operate.^[157] On October 17, 2016, Valve sent a letter to the Washington State Gambling Commission stating that they had "no business relationship with such gambling sites", asserting that they come into existence, operate, and go out of existence without their knowledge and consent, adding that they were not aware of any such law that Steam or any of their games were violating.^[158][159]

In February 2017, theEuropean Commission began investigating Valve and five other publishers—Bandai Namco Entertainment,Capcom,Focus Home Interactive,Koch Media andZeniMax Media—for anti-competitive practices, specifically the use of geo-blocking through the Steam storefront and Steam product keys to prevent access to software to citizens of certain countries. Such practices would be against theDigital Single Market initiative by the European Union.^[160] While the other five companies named are in stages of settling with the EU as of August 2019, Valve has stated it plans to fight the charges, asserting that geo-blocking affects less than 3% of its games, and that it had turned off such geo-blocking within the EU in 2015.^[161]

In January 2021, five gamers filed a proposed class-actionantitrust lawsuit in California against Valve, alleging that the company "abuses the Steam platform's market power" by requiring game developers and publishers to enter into a 'most favored nation' agreement with Valve, restricting their ability to sell games for less on other platforms and thereby preventing price competition.^[162][163]

In May 2021,Wolfire Games filed a proposed class-action antitrust lawsuit against Valve, alleging that the company exertsmonopoly power over the PC gaming market and uses its "gatekeeper role" to "wield extreme power over publishers of PC Desktop Games" and to extract "an extraordinarily high cut from nearly every sale that passes through its store."^[164][165] Although a motion by Valve to dismiss the original lawsuit was granted in November 2021, Wolfire was allowed to file a revised complaint, and in May 2022 US District Court JudgeJohn C. Coughenour ruled that that lawsuit could proceed, finding that Wolfire's allegations were "sufficient to plausibly allege unlawful conduct."^[166] Wolfire's suit was consolidated with a similar lawsuit from another developer. In November 2024, it was affirmed into a class-action lawsuit, with any developer affected by Valve's revenue cut able to be part of the class.^[167]

In June 2024, Vicki Shotbolt, a children's digital rights activist, filed a lawsuit with theCompetition Appeal Tribunal in the UK that accuses Valve of "rigging the market" for PC games, alleging that Valve used its market dominance to overcharge 14 million people in the UK and seeking damages of £22 to £44 per affected customer, or £656 million in total.^[168][169]

In 2023, Valve sued a law firm, Zaiger, alleging that it attempted to extort settlements from Valve by threatening to bring numerous antitrust arbitration cases on behalf of Steam customers, a tactic referred to as "mass arbitration". Valve also brought suit against a litigation financier for Zaiger over the funding of a social media campaign to recruit Steam users as clients. Valve alleged that they improperly interfered with its contracts with Steam customers and abused the arbitration process by signing up clients with the intent of obtaining settlements slightly lower than the cost of arbitration filing fees, rather than arbitrating their claims. Valve said that it was targeted due to the terms of the Steam Subscriber Agreement, in which Valve would be responsible for the fees and costs associated with arbitration. The lawsuit was dismissed without prejudice by theUS District Court for the Western District of Washington in 2024 due topersonal jurisdiction issues.^[170][171]

In September 2024, Valve changed its Steam Subscriber Agreement to require disputes to proceed in court, with no option of arbitration.^[170]

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