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Duke Nukem - Time to Kill
Big Head Enemies, Super Weapons, and More
To change the appearances of Duke and the enemy, pause the game and enter one of these codes.

Big Head Enemies:
R1 9 times, Left.

Big Head Duke:
R1 9 times, Up.

Tiny Head Duke:
R1 9 times, Down.

Infinite Ammo:
L, R, L, R, SELECT, L, R, L, R.

Select All Weapons:
L1, L2, Up, L1, L2, Down, R1, Right, R2, Left.

All Inventory:
R1 five times, L2 five times.

All Keys:
Up, Right, Up, Left, Down, Up, Right, Left, Right, Down.

Double Damage:
L2, R2, L2, R2, L2, R2, L2, R2, L2, R2.

Temporary Invulnerability:
R1, L2, L1, L2, R1, L1, R1, L2, L1, L2.

Super Weapons:
Right, Right, Left, Right, Right, Left, Right, Rihgt, LEft, SELECT.

Level Select:
While playing, pause the game and press Down nine times and then press Up. It should say "Level Select". Now quit the game, and on the main menu, you will see a new option taht says "Time To Kill". Select it and press Right or Left to choose the level you want to go to. Press X to start playing.