In Episode 2 Map 7 (secret level), shoot all of the
gargoyle faces once. They will bleed. Then, go to the long, flashing
corridor where you encounter two Hell Knights in alcoves. Shoot
the wall of the second alcove to reveal a hidden room containing
the initials of Tim Willits and Teresa Chasar, along with a raven
symbol for the raven levels that they made for Doom 2.
Cheats
Strategy: Cheats: by ledmeister
Strategy: Map interconnections: by ledmeister
Strategy: Monster and secret totals: by ledmeister
Strategy: Monster and weapons: by 0393sinc