The Ultimate Doom
Even now, The Ultimate Doom remains ultimately playable.
Marathon
Bungie's legendary first-person shooter takes place on board the starship U.E.S.C. Marathon, which has been overrun by alien attackers and a demented artificial intelligence.
Quake 4 (PC)
The Strogg are regrouping and it is up to you as a member of "Rhino Squad" to deal them the final blow. The Quake 4 story continues where Quake 2's left off, with the half-man, half-machine aliens known as the Strogg hanging on to existence.
Score: 8.0
Quake (PC)
If you're into action games, or even if you're not, you should be playing Quake right now - it's as good as PC gaming gets.
Score: 9.3
Quake III Arena (PC)
Quake III Arena provides the ultimate deathmatch experience.
Score: 9.2