Vault codes:
To enter the following vault screen passwords, play the hidden level and get all four vault "secret" keys. The passwords are entered at the vault screen. Level select - Square, Circle, Circle, Triangle, X, X as a password at the vault screen.
Invincibility - Square, Star, Triangle, Square, Triangle, Diamond as a password at the vault screen.
Eight Hit Paws - Square, Diamond, Triangle, Triangle, Star, Diamond as a password at the vault screen.
Extra life - Triangle, Circle, Star, Square, Square, X as a password at the vault screen.
Ten lives - Square, X, Circle, Circle, Triangle, Square as a password at the vault screen.
Toggle timer - Square, Square, Diamond, Circle, X, X as a password at the vault screen. The timer may be turned on or off at the "Extras" screen.
Play as Alfred - Square, X, Triangle, Square, Star, Star as a password at the vault screen. Can't use after you leave Gex HQ.
Play as Cuz - Square, Diamond, Square, Square, Triangle, Diamond as a password at the vault screen. Can't use after you leave Gex HQ.
Play as Rex - Square, Star, Star, Square, Triangle, Triangle as a password at the vault screen. Can't use after you leave Gex HQ.
Play as DracuGex - Star, X, X, Circle, Square, Triangle as a password at the vault screen. Can't use after you leave Gex HQ.
View FMV sequence - Circle, Triangle, Square, Star, Diamond, Star as a password at the vault screen.
View FMV sequence 2 - Diamond, Star, Square, X, Triangle, Circle as a password at the vault screen.
View FMV sequence 3 - X, Diamond, Star, Triangle, Triangle, Circle as a password at the vault screen.
View all FMV sequences - Star, X, X, Circle, Square, Triangle as a password at the vault screen.
Gex quotes - Square, Triangle, X Star, Square, X as a password at the vault screen. Press Select to hear various comments from Gex.
Debug menu - Square, Square, Diamond, Circle, X X as a password at the vault screen. Press Select to enter the debug menu.