When "Press Start" appears at the opening screen, press C-Up, Up, C-Left, Right, C-Down, Down, C-Right, R, A, B. If you entered the code correctly, you will hear a sound. The "Cheats Menu" will be available but will have no cheats active (unless they were previously activated or earned). Once you start or load a game/level, text will appear in the upper/left hand corner of the screen. Use controller two to control the debug options. Press Start to cycle through the various lists of options. Use the buttons noted below to change certain values. Note: Debug mode does not save on the memory pak like the other cheats.
- L or R: FX down/up
- Left or Right: FX down/up by 10
- B: First person view
- A: Third person view
- Z: Play SFX
Level Warp
- L or R: Level down/up
- B: Skip level
- Z: Advance to selected level
Midi
- L or R: Song down/up
- A: Play song
- B: Stop song
Global Palette
- B or A: Red down/up
- C-Left or C-Down: Green down/up
- C-Up or C-Right: Blue down/up
Cheat
- Z: All weapons
- L: All items
- R: All keys
- A: Invincibility
- AI Debug Values
- B or A: GVAR 1 down/up
- C-Left or C-Down: GVAR 2 down/up
- C-Up or C-Right: GVAR 3 down/up
Fog*
- B or A: Red down/up
- C-Left or C-Down: Green down/up
- C-Up or C-Right: Blue down/up
- Left or Right: NR down/up
- L or R: FR down/up
Sky Top*
- B or A: Red down/up
- C-Left or C-Down: Green down/up
- C-Up or C-Right: Blue down/up
Sky Bottom*
- B or A: Red down/up
- C-Left or C-Down: Green down/up
- C-Up or C-Right: Blue down/up
Clouds 1*
- B or A: Red down/up
- C-Left or C-Down: Green down/up
- C-Up or C-Right: Blue down/up
- L or R: HT down/up
- Down or Up: AN down/up
- Left or Right: SP down/up
Clouds 2*
- B or A: Red down/up
- C-Left or C-Down: Green down/up
- C-Up or C-Right: Blue down/up
- L or R: HT down/up
- Down or Up: AN down/up
- Left or Right: SP down/up
Player
- L or R: DN Down/Up (changes player's character)
GFX
- (Values cannot be changed)
AI
- A: AI 0/1 (set to 1 to stop enemies)
- L: Difficulty 0/1/2
- R: Auto aim 0/1
Alpha Palette
- B or A: R0 down/up
- C-Left or C-Down: G0 down/up
- C-Up or C-Right: B0 down/up
- L or R: R1 down/up
- Left or Right: G1 down/up
- Down or Up: B1 down/up
Weather Cheat works the same way but only has the options noted with an *
- Left or Right: FX down/up by 10
SFX
When "Press Start" appears at the opening screen, press Down, A, Up, L, Z, R, C-Up, C-Down, B, C-Left. If you entered the code correctly, you will hear a sound.
When "Press Start" appears at the opening screen, press C-Up, C-Down, C-Left, C-Right, L, R. If you entered the code correctly, you will hear a sound.
When "Press Start" appears at the opening screen, press Down, Up, A, L, R, Z. If you entered the code correctly, you will hear a sound.
When "Press Start" appears at the opening screen, press A, L, R, Left, B, Down, Up to unlock all Group 1 multi-player characters. If you entered the code correctly, you will hear a sound.
When "Press Start" appears at the opening screen, press B, A(2), R, L to unlock all Group 2 multi-player characters. If you entered the code correctly, you will hear a sound.
When "Press Start" appears at the opening screen, press L(2), Up, Down, R, B, A to unlock all Group 3 multi-player characters. If you entered the code correctly, you will hear a sound.
When "Press Start" appears at the opening screen, press B(3), R, Left, A to unlock all Group 4 multi-player characters. If you entered the code correctly, you will hear a sound.
When "Press Start" appears at the opening screen, press Right, B, Left, L, A, Z to unlock all Group 5 multi-player characters. If you entered the code correctly, you will hear a sound.
When "Press Start" appears at the opening screen, press Up, Down, B, A(2), Left to unlock all Group 6 multi-player characters. If you entered the code correctly, you will hear a sound.
When "Press Start" appears at the opening screen, press C-Left, R, Left, Up, Down, B, A, Z. If you entered the code correctly, you will hear a sound. Skins may be selected in single player mode, but may not be viewed during selection.
When "Press Start" appears at the opening screen, press Down, Up, L, B, Z, Left, C-Up, C-Right, C-Left, Z. If you entered the code correctly, you will hear a sound.
When "Press Start" appears at the opening screen, press Down(2), A, Z(2), Left, A. If you entered the code correctly, you will hear a sound. Alternatively, successfully complete the game to unlock Action Nuk'em mode, which allows Duke to kill opponents with one shot.
When "Press Start" appears at the opening screen, press A(2), Z, A, R, C-Down, B. If you entered the code correctly, you will hear a sound. Alternately, rescue all babes in level 8, "Dry Town", to unlock the cheat option for high speed zombies.
When "Press Start" appears at the opening screen, press B, Up, Down(2), A, Z, A, Right. If you entered the code correctly, you will hear a sound. Alternately, rescue all babes in level 2, "Liberty Or Death", to unlock the cheat option for big head mode.
When "Press Start" appears at the opening screen, press C-Up, C-Left, Z, B, L, Z, A. If you entered the code correctly, you will hear a sound. Alternately, kill all opponents in level 3, "Nuclear Winter", to unlock the cheat option for big gun mode.
When "Press Start" appears at the opening screen, press Down, Up, Left(2), A, Right, Down. If you entered the code correctly, you will hear a sound. Alternately, obtain all secrets in the "Wetworld" secret level to unlock the cheat option for flat shade map.
When "Press Start" appears at the opening screen, press B, Z, Up, L, A, C-Right, A. If you entered the code correctly, you will hear a sound. Alternately, rescue all babes in level 5, "Fallout", to unlock the cheat option for ice skin.
When "Press Start" appears at the opening screen, press Z, A, L, B, Down, Up, R. If you entered the code correctly, you will hear a sound. Alternately, obtain all secrets in level 6, "Under Siege", to unlock the cheat option for weather.
Successfully complete the game with all babes rescued and all opponents killed to unlock Extreme mode, which allows the game to be played at a higher difficulty setting.
Successfully complete any level and save the game to unlock one additional character in multi-player mode.
Kill all opponents in level 9, "Jailbreak", to unlock the cheat option for maximum blaster ammunition.
Rescue all babes in level 10, "Up Ship Creek", to unlock the cheat option for maximum shotgun ammunition.
Rescue all babes in level 11, "Ft. Roswell", to unlock the cheat option for maximum rifle ammunition.
Kill all opponents in level 12, "Probing The Depths", to unlock the cheat option for maximum revolver ammunition.
Kill all opponents in level 13, "Whitechapel Killings", to unlock the cheat option for maximum sawn-off shotgun ammunition.
Obtain all secrets in level 15, "Dawn Of The Duke", to unlock the cheat option for maximum SMG ammunition.
Kill all opponents in level 16, "Hydrogen Bomb", to unlock the cheat option for maximum gatling gun ammunition.
Obtain all secrets in level 17, "The Rack", to unlock the cheat option for maximum Volt C. ammunition.
Rescue all babes in the "Going Down" secret level to unlock the cheat option for maximum sniper ammunition.
Kill all opponents in level 20, "The Brothers Nukem", to unlock the cheat option for maximum freezer ammunition.
Rescue all babes in level 21, "Alien Mothership", to unlock the cheat option for maximum gamma ammunition.
Play through the "Nuclear Winter" level until reaching the rail tracks leading to the communicator. Then, power up and drop off onto the roof below where a medi-kit can be seen. Jump off this roof into the water (which is only on one side). Swim to a floating platform, where the level exit will appear.
Collect all the time machine pieces before reaching "The Rack" level. Then a second exit portal will appear in the room just off where the first is located. Use it to reach the "Going Down" (Titanic) level.
Destroy a fire hydrant, or another water source. Then, stand in the water and hold A to slowly restore health. Alternatively, stand in front of a toilet or urinal and press A.
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Game Shark Codes
Note: You must have a 2.2 or higher version of the Game Shark to use these codes.
Infinite Health (Mean Streets)
8019F061 0096
Infinite Health (Liberty or Death)
8019E955 0096
Infinite Health (Nuclear Winter)
8019E4D9 0096
Infinite Health (Secret Level: Wetworld)
8019DA99 0096
Infinite Health (Fallout)
8019D61D 0096
Infinite Health (Under Siege)
8019E4D9 0096
Infinite Health (Boss Hog)
8019BF0D 0096
Infinite Health (Dry Town)
8019FB45 0096
Infinite Health (Jailbreak)
8019E1A5 0096
Infinite Health (Up Ship Creek)
8019E391 0096
Infinite Health (Fort Roswell)
8019F395 0096
Infinite Health (Probing The Depths)
8019E05D 0096
Infinite Health (Cyborg Scorpion)
8019C055 0096
Infinite Health (The Whitechapel Killings)
8019F1A9 0096
Infinite Health (Dawn of the Duke)
8019F625 0096
Infinite Health (Hydrogen Bomb)
8019E2ED 0096
Infinite Health (Dunroamin Castle)
8019DB3D 0096
Infinite Health (Going Down)
8019C0F9 0096
Infinite Health (Brainstorm)
8019C94D 0096
Infinite Health (The Brothers Nukem)
8019D579 0096
Infinire Health (Alien Mother)
8019BC7D 0096
Have Pistol
8111A6A8 0001
Infinite Pistol Ammo
8111A6AA 0063
8111A6B0 0000
Pistol Never Needs to Reload
8111A6B2 0000
Have Shotgun
8111A6D0 0001
Infinite Shotgun Ammo
8111A6D2 0063
8111A6D8 0000
Shotgun Never Needs to Reload
8111A6DA 0000
Have Machine Gun
8111A6F8 0001
Infinite Machine Gun Ammo
8111A6FA 0063
8111A700 0000
Machine Gun Never Needs to Reload
8111A702 0000
Have Grenade Launcher
8111A720 0001
Infinite Grenade Launcher Ammo
8111A722 0063
8111A728 0000
Grenade Launcher Never Needs to Reload
8111A72A 0000
Have Pipe Bomb
8111A748 0001
Infinite Pipe Bomb Ammo
8111A74A 0063
8111A750 0000
Pipe Bomb Never Needs to Reload
8111A752 0000
Have Dynamite
8111A770 0001
Infinite Dynamite Ammo
8111A772 0063
8111A778 0000
Dynamite Never Needs to Reload
8111A77A 0000
Have ?
8111A798 0001
Infinite ? Ammo
8111A79A 0063
8111A7A0 0000
? Never Needs to Reload
8111A7A2 0000
Have Machine Shotgun
8111A7C0 0001
Infinite Machine Shotgun Ammo
8111A7C2 0063
8111A7C8 0000
Machine Shotgun Never Needs to Reload
8111A7CA 0000
Have Plasma Gun
8111A7E8 0001
Infinite Plasma Gun Ammo
8111A7EA 0063
8111A7F0 0000
Plasma Gun Never Needs to Reload
8111A7F2 0000
Have Lasergun
8111A810 0001
Infinite Lasergun Ammo
8111A812 0063
8111A818 0000
Lasergun Never Needs to Reload
8111A81A 0000
Have Handgun (Won't Fire?)
8111A6D0 0001
Infinite Handgun Ammo
8111A6D2 0063
8111A6D8 0000
Handgun Never Needs to Reload
8111A6DA 0000
Cannot Jump
81117F1C 0100
Moon Jump [Note]
D0117DF4 0008
81117EEC FFFF
D0117DF4 0008
81117EEE FC00
Note: Hold L to rise, release L to land.
