A lonely Marine stationed on Mars has seen some horrible things. His fellow squad mates being torn apart by the invading forces of Hell, a base filled with horrors only Hell could create, and seeing himself faced with death everyday. After defeating one of the most horrifying forces he has ever seen, he discovered something, another human surviving in the base. After trying to follow her, she lead him to a teleporter. But not the normal ones he is use to seeing, but one that was so large in size, it took up a humongous laboratory. Seeing her disappear into the large device he was suddenly ambushed by the Demons that he couldn't hate anymore than he did at that moment. After dodging, and killing the endless stream of enemies, a stray bolt of energy thrown by a Hell Knight hit the teleporter, causing it to spark, and malfunction. Having to choose between certain death, or risking a teleporter ride that could send him anywhere in the world, he quickly made his decision and jumped on the platform. After living through a Demonic invasion. After battling through hordes of Demons, and former humans. Not even he could believe where he had ended up. A colorful world filled with happiness and… Ponies.

Based on the Popular Video Game, "DOOM." It mixes the setting of DOOM 1 and 2. And the story of DOOM 3. Along with original characters, and story arch.