Duke Nukem 64

Weapons Fire Faster
802AD584-00FF

NOTE:Some weapons, like the missile launcher, are limited
in fire rate because of the speed of launched missiles.

Press A+B To Instantly Complete A Level  (GS 3.0+ Needed)
D12AD164 C000
802A5A56 0001

Third Person View
802A5A53 0001
NOTE: Code gets glitchy when you are shrunk, but returns to normal after a while.

P1 Plasma Cannon Charge Modifier
D02A5A23 000A
802A5A33 0063

P2 Plasma Cannon Charge Modifier
D02A5DAF 000A
802A5DBF 0063
 
P3 Plasma Cannon Charge Modifier
D02A613B 000A
802A614B 0063
 
P4 Plasma Cannon Charge Modifier
D02A64C7 000A
802A64D7 0063

NOTE: These codes allows Duke to instantly fire full charge shots. 
Changing the last 2 digits of the code allows you to adjust the charge that the 
plasma cannon is capable of firing.

P1 Press A+Z To Kick When Using A Gun
D12AD164 A000
802A5A23 00FF
D12AD164 A000
802A5A5B 000F

P2 Press A+Z To Kick When Using A Gun
D12AD16C A000
802A5DAF 00FF
D12AD16C A000
802A5DE7 000F

P3 Press A+Z To Kick When Using A Gun
D12AD174 A000
802A613B 00FF
D12AD174 A000
802A6173 000F

P4 Press A+Z To Kick When Using A Gun
D12AD17C A000
802A64C7 00FF
D12AD17C A000
802A64FF 000F

NOTE:Sound and graphics glitch slightly
when the kick is used.

P1 Take No Damage From Falling
802A5AB8 0000

P2 Take No Damage From Falling
802A5E44 0000

P3 Take No Damage From Falling
802A61D0 0000

P4 Take No Damage From Falling
802A655C 0000

P1 Vitamin X Always Active
812A5A90 00FF

P2 Vitamin X Always Active
812A5E1C 00FF

P3 Vitamin X Always Active
812A61A8 0090

P4 Vitamin X Always Active
812A6534 0090

P1 Pipe Bomb Range Modifier
DO2A5A23 0005
802A5A33 000A
 
P2 Pipe Bomb Range Modifier
D02A5DAF 0005
802A5DBF 000A
 
P3 Pipe Bomb Range Modifier
D02A613B 0005
802A614B 000A
 
P4 Pipe Bomb Range Modifier
D02A64C7 0005
802A64D7 000A

NOTE: Changing the last 2 digits of the code allows you to adjust the distance 
that Duke can throw the pipe bomb. The current setting allows Duke to throw the 
pipe bombs twice as far.

P1 Rapid Fire
D02A5A23 000?
D02AD164 0020
812A5A44 000!
D02A5A23 000?
D02AD164 0060
812A5A44 000!

P2 Rapid Fire
D02A5DAF 000?
D02AD16C 0020
812A5DD0 000!
D02A5DAF 000?
D02AD16C 0060
812A5DD0 000!

P3 Rapid Fire
D02A613B 000?
D02AD174 0020
812A615C 000!
D02A613B 000?
D02AD174 0060
812A615C 000!

P4 Rapid Fire
D02A64C7 000?
D02AD17C 0020
812A64E8 000!
D02A64C7 000?
D02AD17C 0020
812A64E8 000!

NOTE: The last three lines of code allow you to use rapid fire while crouching, 
they aren't absolutely necessary to make the code work. The digit indicated by ? 
must be the same weapon as the digit indicated by !.

Replace ? with:

00-Boot
01-Pistol
02-Shotgun
03-SMG's
04-Grenade Launcher
07-Expander
08-Missile Launcher

Replace ! with:

01-Pistol
02-SMG's
03- Shotgun/Grenade Launcher/Missile Launcher
06-Shrinker/Expander/Mighty Boot

P1 Jetpack Always Active
802A5AB1 000F

P2 Jetpack Always Active
802A5E3D 000F

P3 Jetpack Always Active
802A61C9 000F

P4 Jetpack Always Active
802A6555 000F

NOTE:The jetpack is not needed for this code to work. 
You will be able to fly at all times, and the code can't be turned off in game. 
This may prevent players from completing certain levels. 
I suggest using these codes for fun, and to mess around with the Dukebots 
in multiplayer mode.

P1 Nightvision Always Active
802A5AB6 0001

P2 Nightvision Always Active
802A5E42 000F

P3 Nightvision Always Active
802A61CE 000F

P4 Nightvision Always Active
802A655A 000F

P1 Scuba Gear Always On
802A5AB4 0010

P2 Scuba Gear Always On
802A5E40 0010

P3 Scuba Gear Always On
802A61CC 0010

P4 Scuba Gear Always On
802A6558 0010

P2 Infinite Ammo (all guns)
50000F02 0000
802A5D8D 0063

P3 Infinite Ammo (all guns)
50000F02 0000
802A6119 0063

P4 Infinite Ammo (all guns)
50000F02 0000
802A64A5 0063

P2 Infinite Medkit
812A5DD6 0101

P3 Infinite Medkit
812A6162 0101

P4 Infinite Medkit
812A64EE 0101

P2 Infinite Jetpack
812A5E1A 0FFF

P3 Infinite Jetpack
812A61A6 0FFF

P4 Infinite Jetpack
812A6532 0FFF

P2 Infinite Scuba Gear
812A5E18 0FFF

P3 Infinite Scuba Gear
812A61A4 0FFF

P4 Infinite Scuba Gear
812A6530 0FF

P2 Infinite Armor
812A5E1E 0101

P3 Infinite Armor
812A61AA 0101

P4 Infinite Armor
812A6536 0101

P2 Infinite Protective Boots
812A5E2E 0101

P4 Infinite Protective Boots
812A6546 0101

P3 Infinite Holoduke
812A6162 0FFF

P4 Infinite Holoduke
812A64D0 0FFF

P3 Infinite Nightvision
812A6174 0FFF

P4 Infinite Nightvision
812A6500 0FFF