The Ultimate Doom is the definitive version of the classic game 'Doom'. This version features the three initial episodes and a later episode to ensure maximum replayability. The game itself is now over two decades old, but it is considered to be the breakthrough title in the genre of first-person shooting games, with an untold number of games since capitalising on Doom's initial success. Doom still has a thriving community to keep the game updated, as well as the classic elements of plenty of action and a well-crafted story mode.