Duke Nukem: Time to Kill

Pause the game, press following keys:
Invincibility - L2, R1, L1, R2, UP, DOWN, UP, DOWN, SELECT(x2).
Temporary invincibility - R1, L2, L1, L2, R1, L1, R1, L2, L1, L2.
All weapons - L1, L2, UP, L1, L2, DOWN, R1, RIGHT, R2, LEFT.
Invisibility - L1, L2, L1, R1, L1, R1, L1, R1, L1, R1.
Unlimited ammunition - LEFT, RIGHT, LEFT, RIGHT, Select, LEFT, RIGHT, LEFT, RIGHT, Select.
All items - R1(x5), L2(x5).
All keys - UP, RIGHT, UP, LEFT, DOWN, UP, RIGHT, LEFT, RIGHT, DOWN.
Powered-UP weapons - R1, R2, L2, L1, R1, R2, L2, L1, Select(x2).
Double damage - L2, R2, L2, R2, L2, R2, L2, R2, L2, R2.
Unlimited continues - LEFT, RIGHT, UP, LEFT, RIGHT, DOWN, LEFT, RIGHT, L1, R1.
Motorcycle - L1, R2, R1, R1, L2, L1.
Big head Duke - R1(x9), UP.
Small head Duke - R1(x9), DOWN.
Big head opponents - R1(x9), LEFT.
Small head opponents - R1(x9), RIGHT. Alternatively, pause game play and press R1(x3), L1(x3), R2(x3), RIGHT.
Introduction sequence - Select, UP(x9), Select, L1.
Victory sequence - Select, UP(x9), Select, L2.
Kilt sequence - Select, UP(x9), Select, R2
View credits - Select, UP(x9), Select, R1.
Level select - DOWN(x9), UP, then exit the current game. Select the "Time To Kill" option at the bottom of the main menu, press LEFT or RIGHT to select a level, then press X to begin game play.

Game completed:
Hold L2 + R2 and press Square, Triangle, Circle(x2), Start during game play.

Rogue Trip FMV sequence:
Press L1 + L2 + R1 + R2 at the GT Interactive logo during the opening sequence.

Time To Kill level - Secret room:
Go into the club, go behind the bar, and look to your left. You will see a switch. Press X while in front of it and a door to a secret room will open next to the second dancer. Be careful, as there is a pig cop inside.

 