Doom: Collector's Edition In Ultimate DOOM you're a space marine with nothing but guts and a pistol. Locate stronger firepower and shoot your way through undead marines and mutant demons from hell -- 27 levels of bloody action When the original DOOM leaves you wanting more, you can start up with DOOM II -- the forces of the Netherworld have invaded, and you're the only one who can stop them Final DOOM is the final chapter in the legendary Doom series -- featuring 2 new 32-level episodes with complete stories Features the classic 3D DOOM graphics that made it a hit when it was first released