All Items Enable the "Cheat menu" code. Then at the main menu, press R, C-Right , Right, L, C-Left , Left, C-Right, Right 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.
Big Duke Start a game in co-op or deathmatch mode. Enable the "All items" code and the "Friendly Fire" option. Now have one player shoot the other player with the expander gun. Enable the "Invincibility" code before the first player explodes, then disable "Invincibility".
Cheat Menu At the main menu, press Left(2), L(2), Right(2), Left(2) in the NTSC version of the game. For the PAL version of the game, press Left, Down, L(2), Up, Right, Left, Up.
Infinite Jet Pack Fuel While flying with the jet pack, enable the "All items" code.
Invincibility Enable the "Cheat menu" code. Then at the main menu, press R(7), Left in the NTSC version of the game. If you entered the code correctly, you will hear a sound. Now an option for invincibility will appear on the cheat menu. For the PAL version of the game, press R, C-Right, R, L, R(3), Left.
Level Select Enable the "Cheat menu" code. Then, press L(3), C-Right, Right, Left(2), C-Left in the NTSC version of the game. For the PAL version of the game, press R, L, R, C-Down, Right, Up, Left, C-Up.
No Monsters Enable the "Cheat menu" code. Then, press L, C-Left, Left, R, C-Right, Right, Left(2), Right in the NTSC version of the game. If you entered the code correctly, you will hear the sound of a siren. Now an option to toggle monsters on/off will appear on the cheat menu. For the PAL version of the game, press L, C-Up, Left, L, C-Down, R, L, R.
Refill Health 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.
Small Duke Start a game in co-op or deathmatch mode. Enable the "All items" code and the "Friendly Fire" option. Now have one player shoot the other player with the shrinker gun. Enable the "Invincibility" code, then disable "Invincibility".
Gameshark Duke Nukem 64 Hacks
Infinite Health Level 1
80247463 00FF
Infinite Ammo (Pistol)
802A5A01 00FF
Have All Keys
802A5A47 000F
Have Shotgun
802A5ABB 0001
Infinite Ammo (Shotgun)
802A5A03 00FF
Have Sub Machine Guns
802A5ABC 0001
Infinite Ammo (SMG's)
802A5A05 00FF
Have Grenade Launcher
802A5ABD 0001
Infinite Ammo (Grenade Launcher)
802A5A07 00FF
Have Pipe Bombs
802A5ABE 0001
Infinite Ammo (Pipe Bombs)
802A5A09 00FF
Have Shrinker
802A5ABF 0001
Infinite Ammo (Shrinker)
802A5A0B 00FF
Have Expander
802A5AC0 0001
Infinite AMmo (Expander)
802A5A0D 00FF
Have Missile Launcher
802A5AC1 0001
Infinite Ammo (Missile Launcher)
802A5A0F 00FF
Have Plasma Cannon
802A5AC2 0001
Infinite Ammo (Plasma Cannon)
802A5A11 00FF
Have Laser Trip Bomb
802A5AC3 0001
Infinite Ammo (Laser Trip Bomb)
802A5A13 00FF
Infinite Armor
812A5A92 0064
Infinite Vitamin K
812A5A90 0190
Infinite Jet Pack
812A5A8E 0640
Infinite Scuba Gear
812A5A8C 1900
Weapon Equipped Modifier
802A5A23 000?
Open Cheat Menu
801012D8 0001
Open Invincibility Cheat
801012DC 0001
Open Monsters Cheat
801012E0 0001
Open All Items Cheat
801012E4 0001
Open Goto Level ?? Cheat
801012E8 0001
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Duke Nukem 64 Strategy Guide
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