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Marine Doom is a 1996modification of thefirst-person shooterDoom II for theUnited States Marine Corps, which was later made available for download to the public.In the game, afireteam, comprising four Marines, is supposed to accomplish a specific mission, the default being the destruction of an enemy bunker, although other scenarios such as a hostage rescue in a foreign embassy can be designed. In order to allow coordination of their movements, these soldiers play on separated computers in the same room. The fireteam consists of a team leader, two riflemen and one machine-gunner. A major intent of the mod was to train soldiers "intactics andcommunications".^[1]

Thedemon enemies from the originalDoom series were replaced with "opposition forces".^[1]

In 1996,GeneralCharles C. Krulak,Commandant of the U.S. Marine Corps, issued adirective to usewargames for improving "Military Thinking and Decision-Making Exercises". He entrusted theMarine Combat Development Command with the task of developing, exploiting and approving computer-based wargames to train U.S. Marines for "decision making skills, particularly when live training time and opportunities were limited".

A group of U.S. Marinesimulations experts originally led byMajor Kirk Skinner, includingLieutenant Luis E. Velazquez and Lieutenant Scott Barnett as the project officers with Sergeant Snyder as one of the designers and modelers, inQuantico, Virginia of theAutomated Information Systems Office, and laterMarine Corps Modeling and Simulation Management Office (MCMSMO), obtained a copy of the commercialDoom, released in 1993 byid Software, and used it to develop a simulation that focused on mutual fireteam support, protection of the automatic rifleman, proper sequencing of an attack, ammunition discipline and succession of command.

Theircode was adapted for the commercialDoom II before its release, and requires a commercial copy ofDoom II 1.9 to run.

In 1997, video game publisherGT Interactive acquired the rights to distributeMarine Doom.^[2]

U.S. Marine Sergeant Dan Snyder, who worked on the mod, was later a consultant on the video gameNAM.^[3]

• Full Spectrum Warrior, another game initially developed for the United States Army for training purposes
• Recruitment tool
• America's Army, a complete game developed on behalf of the United States Army as a recruiting tool
• Doom modding

• "Doom Goes To War - The Marines Are Looking For A Few Good Games" -Wired article by Rob Riddell, April 1997
• "Military Thinking and Decision Making Exercises directive 1500.55" by Marine Corps Commandant (on April 4, 1997)
• "Marine Corps Modeling and Simulation Management Office"Archived 2005-03-16 at theWayback Machine
• Survey at the U.S. Army Topographic Engineering Center

• 1996 video games
• Advergames
• Doom mods
• DOS games
• DOS-only games
• First-person shooters
• Propaganda video games
• Video games about the United States Marine Corps
• Video games developed in the United States
• Sprite-based first-person shooters

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• Short description matches Wikidata
• Articles needing additional references from January 2018
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