Microcosm was a science fiction shooter game released for the 3DO interactive multiplayer system in 1994. Set inside the human body, the game had players navigating a microscopic ship through various biological environments, battling enemies and facing obstacles related to the human anatomy. It belongs to the rail shooter genre, where the player is on a preset path and controls the crosshair to target and destroy enemies. Microcosm was known for its impressive-at-the-time FMV graphics and unique setting, though it received mixed reviews for its gameplay and difficulty.