Enter the following as passwords:
Invincibility Circle, Circle, Triangle, Triangle, Circle, X, Square, X. All weapons Triangle, Triangle, Circle, Circle, Circle, X, Square, X. Infinite ammo Triangle, Circle, Circle, Circle, Square, X, Triangle, Square.
Level Passwords:
Gorgon X, X, Triangle, Square, Square, X, Circle, X Dimensional Temple Square, X, Triangle, Square, Square, Square, Circle, X Floating Fortress Circle, X, Triangle, Square, Square, Circle, Circle, X Spirit Bog Triangle, X, Triangle, Square, Square, Triangle, Circle, X Canyon Village X, Square, Triangle, Square, Square, X, Triangle, X Creepy Caverns Square, Square, Triangle, Square, Square, Square, Triangle, X Space Ship Circle, Square, Triangle, Square, Square, Circle, Triangle, X Hall Of Patriots Triangle, Square, Triangle, Square, Square, Triangle, Triangle, X Graveyard Of X, Circle, Triangle, Square, Square, X, X, War Machines Square Nuclear Mine Square, Circle, Triangle, Square, Square, Square, X, Square Launch Center Circle, Circle, Triangle, Square, Square, Circle, X, Square Ulhaden Fier Triangle, Circle, Triangle, Square, Square, Triangle, X, Square Garrison X, Triangle, Triangle, Square, Square, X, Square, Square Inner Sanctum Square, Triangle, Triangle, Square, Square, Square, Square, Square
Thanks to Revolution readers G-man, chipathy, Vinnie, Brian, shaun, Chris McClain,
Cmiller, and Grey_Fox!