(BASED ON THE POPULAR VIDEO GAME.)

A gateway to Hell has accidentally been opened and demons are coming out.
They're killing people as they are running about.
I'm scared but I choose to fight instead of run.
I just killed one of these monsters with a shotgun.
I'm fighting Imps, cyberdemons and Cacodemons too.
I fire a rocket launcher and turn them into goo.
When my comrades get killed, they cease to be human and become zombies instead.
I'm going to keep fighting and going through this nightmare until all of these monsters are dead.