- ALL MISSIONS:
PAUSE GAME, PRESS UP, DOWN, LEFT, RIGHT, LEFT, LEFT, RIGHT, RIGHT. RETURN TO GAME TO HEAR SPAWN SAY "NECROLICIOUS".
- ALL COMICS:
PAUSE GAME, PRESS UP, DOWN, LEFT, RIGHT, RIGHT, LEFT, LEFT, UP. RETURN TO GAME TO HEAR SPAWN SAY "NECROLICIOUS".
- OPEN ENCYCLOPEDIA:
PAUSE GAME, PRESS UP, DOWN, LEFT, RIGHT, LEFT, RIGHT, UP, DOWN. RETURN TO GAME TO HEAR SPAWN SAY "NECROLICIOUS".
- ALL WEAPONS:
PAUSE GAME, PRESS UP, DOWN, LEFT, RIGHT, LEFT, RIGHT, LEFT, LEFT. RETURN TO GAME TO HEAR SPAWN SAY "NECROLICIOUS".
- INFINITE AMMO:
PAUSE GAME, PRESS UP, DOWN, LEFT, RIGHT, UP, LEFT, DOWN, RIGHT. RETURN TO GAME TO HEAR SPAWN SAY "NECROLICIOUS".
- INFINITE NECROPLASM:
PAUSE GAME, PRESS UP, DOWN, LEFT, RIGHT, DOWN, LEFT, UP, RIGHT. RETURN TO GAME TO HEAR SPAWN SAY "NECROLICIOUS".
- NO BLOOD:
PAUSE GAME, PRESS UP, DOWN, LEFT, RIGHT, UP 4 TIMES. NO SOUND CONFIRMS THE CODE.
