Doom Guy

He's the motherfucking Doom Guy. He rips and tears like a total badass.

Origins
The Marine was one of Earth's toughest, hardened in combat and trained for action. He had been incarcerated on Mars after assaulting a senior officer when ordered to fire upon civilians. There, he worked alongside the Union Aerospace Corporation (UAC), a multi-planetary conglomerate and military contractor performing secret experiments on interdimensional travel.

Something went wrong with the teleportation research and a few of the worst inmates from Hell, along with mutated demons from The Abyss had been forced through the teleportation gates on Deimos and Phobos. (The Heaven Invasion had been taking place during this time.) The bases are quickly overrun by the mutated Abyss spawn. Two of the inmates from Hell (Foxy and Daniel) saw opportunity and became kings of Deimos and Phobos, ruling over the demons that had been cut off from the signal of The Abyss.

A military detachment, containing The Marine, from Mars traveled to Phobos to investigate the incident. As the assault team moves inside, The Marine is left to guard the perimeter (with only a pistol). After hearing assorted radio messages, gunfire, and screams, followed by silence, The Marine decides to move in himself and fight through the Phobos complex.

After ripping and tearing his way through the high-tech military bases, power plants, computer centers and geological anomalies on Phobos, The Marine encounters Foxy, who then runs through a teleporter leading to Deimos. The Marine follows behind, only to be overwhelmed by monsters, unable to chase Foxy.

The Marine fights his way through the horde

Skills

 * Can run at a whopping 57 miles per hour (92 km/h) without losing stamina.
 * Fall from great heights without getting hurt.
 * Carry a large supply of rockets and other ammunition without being weighed down.