All of these codes are done at the Cheat Screen.

Invincibility 

L1, Square, Circle, Circle, Square, L1, L2

Level Select

Circle, X, Square, Square, X, Square, Circle

Double Damage

Square, Square, Square, Circle, Circle, X

Full Armor 

L1, L1, R1, R1, X, X, Circle, Circle

All Guns

R2, X, L1, Square, R1, Circle, L2

Unlock All Codes

L1, L2, R2, R1, L1, L2, R2, R1, L1, L2, R2, R1, L1, L2, R2, R1, Circle, Circle, Circle, Circle X, X, X, X Square, Square, Square, Square, Select, Select, Select, Select.

10/01/00