Doom

Screenshots:

Background:
Doom is still considered to be one of the founding fathers of the FPS genre, as it has been the basis of so many games since. You are a marine stuck on a moon base with an entire horde of demons and undead marines from Hell. Armed only with a pistol, your mission is simple and clear: Get bigger and better weapons to blast your way through a multitude of rigorous levels.

For more information on weapons, monsters, items, visit the Neoseeker Doom Portal