Doom 3: Resurrection of Evil Expansion Pack Fight back against a demonic invasion of a Mars research facility First-person shooter game with real-time dynamic lighting and shadows Realistic physics; revolutionary new 3D graphics engine Cinema-quality visuals; surround sound; ever-changing environment Number of Players: 8 Fight back against a demonic invasion of a Mars research facility First-person shooter game with real-time dynamic lighting and shadows Realistic physics; revolutionary new 3D graphics engine Cinema-quality visuals; surround sound; ever-changing environment Single- and multi-player action for ages 17 or older