After killing the Spiderdemon at the end of E4M8 (Unto the Cruel), Earth is the next destination — someone has to stop the hellspawn tearing it apart. But the demon lord Baphomet corrupts the final teleporter with a hidden Sigil, diverting the marine into an even darker corner of Hell. He must fight through this stygian pocket of evil, confront Satan's ultimate servants, and eventually find a way back to Earth to serve as its savior. Rip and tear.