Duke Nukem 64

System: Nintendo 64

Cheat mode:
Press Left(2), L(2), Right(2), Left(2) at the main menu to access the cheat menu in the NTSC version of the game. For the PAL version of the game, press Left, Down, L(2), Up, Right, Left, Up.

All items:
Enable the "Cheat mode" code. Press R, C-Right , Right, L, C-Left , Left, C-Right, Right at the main menu in the NTSC version of the game. For the PAL version of the game, press R, C-Right, Down, L, C-Up, Left, C-Right, Left.

Invincibility:
Enable the "Cheat mode" code. Press R(7), Left at the main menu in the NTSC version of the game. A sound will confirm correct code entry. The invincibility option may now be enabled on the cheat menu. For the PAL version of the game, press R, C-Right, R, L, R(3), Left.

No monsters:
Enable the "Cheat mode" code. Press L, C-Left, Left, R, C-Right, Right, Left(2), Right in the NTSC version of the game. The sound of a siren will confirm correct code entry. Monsters may now be toggled on the cheat menu. For the PAL version of the game, press L, C-Up, Left, L, C-Down, R, L, R.

Level select:
Enable the "Cheat mode" code. Press L(3), C-Right, Right, Left(2), C-Left in the NTSC version of the game. A level select option will now be available. For the PAL version of the game, press R, L, R, C-Down, Right, Up, Left, C-Up.

Unlimited jet pack fuel:
Enable the "All items" code while flying with the jet pack.

Huge Duke:
Start a game in co-op or deathmatch mode. Enable the "All Items" code, as well as the "Friendly Fire" option. Have one player shoot the other player with the expander weapon. Enable the "Invincibility" code before the first player explodes, then disable "Invincibility".

Tiny Duke:
Start a game in co-op or deathmatch mode. Enable the "All Items" code, as well as the "Friendly Fire" option. Have one player shoot the other player with the shrink weapon. Enable the "Invincibility" code, then disable "Invincibility" to get a small version of Duke. Note: Weapons can not be used in this state.

Energy refill:
Destroy any water source, including fountains, fire hydrants, and toilets. Stand in the water and hold A to slowly restore energy. Alternately, stand in front of a toilet or urinal and press A.

Fire protection:
Continually jump while over hot spots to avoid damage.