There's a slight glitch in the instantaneous transport system that Union Aerospace Corp. (UAC) is developing in its Mars labs -- it opens the portals of Hell.
One moment the station is clean and pristine, though a little bit cramped. The next, it's decrepit and littered with mangled bodies. Worst of all, it's crawling with zombies, monsters, mutants and demons.
Welcome to "Doom 3," the most visually advanced computer game in history.