Based on an old fanfic based on Doom II: Repercussions of Evil.
John Stalvern waited. The lights above him blinked and sparked out of the air. There were ponies in the base. He didn’t see them, but had expected them now for years. His warnings to Cernel Joson were not listened to and now it was too late. Far too late for now, anyway.
John was a space marine for fourteen years. When he was young he watched the spaceships and he said to dad “I want to be on the ships daddy.”
Dad said “No! You will be KILL BY PONIES”
There was a time when he believed him. Then as he got oldered he stopped. But now in the space station base of the UAC he knew there were demons.
“This is Joson” the radio crackered. “You must fight the ponies!”
So John got his palsma rifle and blew up the wall.
“He going to kill us” said the ponies.
“I will shoot at him” said the unicorn and he fired a lasers. John plasmaed at him and tried to blew him up. But the ceiling fell and they were trapped and not able to kill.
“No! I must kill the ponies” he shouted.
The radio said “No, John. You are the ponies”
And then John was a pony.