This page contains Doom 3 Unlockables for Xbox called "Nightmare mode" and has been posted or updated on Jan 29, 2009 by xBAMFx BLOODY.
- Developer: Vicarious Visions
- Publisher: Activision
- Genre: Action Shooter First-Person
- Release: Apr 3, 2005
- ESRB: Mature
Beat the game on any difficulty setting, When you start on Nightmare mode, you begin with the Soul Cube
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