It is an origin story.
The demons have been constructed through corrupt UAC experiments. The game is fast paced, with sprinting, double jumping, and mantling being possible. Doom - Demon Multiplayer Pack DLC Steam CD Key No reloading mechanics are present (there are ammo pickups however) nor regenerati. Demon Multiplayer Pack includes the following: Demon Armour Set Six Metallic Paints Three ID Logo Patterns Six Hack Modules usable in multiplayer matches Doom The game is set on Mars, with a UAC facility being invaded by the forces of Hell.