In the game, a fireteam, 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.
[1] In 1996, General Charles C. Krulak, Commandant of the U.S. Marine Corps, issued a directive to use wargames for improving "Military Thinking and Decision-Making Exercises".
A group of U.S. Marine simulations experts originally led by Major Kirk Skinner, including Lieutenant Luis E. Velazquez and Lieutenant Scott Barnett as the project officers with Sergeant Snyder as one of the designers and modelers, in Quantico, Virginia of the Automated Information Systems Office, and later Marine Corps Modeling and Simulation Management Office (MCMSMO), obtained a copy of the commercial Doom, released in 1993 by id 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.
[citation needed] In 1997, video game publisher GT Interactive acquired the rights to distribute Marine Doom.
[2] U.S. Marine Sergeant Dan Snyder, who worked on the mod, was later a consultant on the video game NAM.