Ultimate — Doom-gog

: Upon reaching Deimos, you discover the moon has been pulled into Hell itself.

You are a space marine, the toughest of your kind, sent to the research facilities on Mars’ moons, Phobos and Deimos, as a disciplinary transfer after assaulting a superior officer who ordered you to fire on civilians. The UAC had been experimenting with inter-dimensional travel, but the gateway collapsed, allowing the literal legions of Hell to swarm into our reality. The Survival Mission Ultimate Doom-GOG

Exclusive to version, this fourth episode bridges the gap between the original game and its sequel. After defeating the Spider Mastermind, you return to Earth only to find it under siege. Before you can join the main resistance, you must battle through a final, grueling gauntlet of demons to reach the surface of your home planet. The Ultimate DOOM - Dreamlist - GOG.com : Upon reaching Deimos, you discover the moon