Doom 64

After the demonic invasion on Deimos & Phobos was averted, the military and the Union Aerospace Corporation decided to bombard the moons with extreme radiation in hope of killing off the few remaining abominations. Unfortunately, a single, mysterious entity, possessing the ability to resurrect any dead demon it came across, survived the exposure and recreated the entire demonic horde - stronger and more vicious than ever before, they invade Earth to spread chaos and death! As all your comrades of the marine strike force were mercilessly slaughtered, your mission as the Last Man Standing is clear - exterminate all the demons and send them back to hell!