Coop Mode
First you need to enter the debug cheat at the press start screen this is UpC Up LeftC Right DownC Down RightC R A B Now start a multiplayer game with two or three players not four When you start use the spare pad to select a level and you will start a coop game plus all the items will regenarate after a short amount of time
Refill Health
Shoot a fire hydrant or a toilet and press B next to it repeatedly to gain back your health
Various Cheats and Hints
Cheat mode
Press Left Left L L Right Right Left Left 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 L Up Right Left Up
Invincibility
Enable the quotCheat modequot code Press R R R R R R R 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 CRight R L R R R Left
All items
Enable the quotCheat modequot code Press R CRight Right L CLeft Left CRight Right at the main menu in the NTSC version of the game For the PAL version of the game press R CRight Down L CUp Left CRight Left
No monsters
Enable the quotCheat modequot code Press L CLeft Left R CRight Right Left Left 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 CUp Left L CDown R L R
Level select
Enable the quotCheat modequot code Press L L L CRight Right Left Left CLeft 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 CDown Right Up Left CUp
Unlimited jet pack fuel
Enable the quotAll itemsquot code while flying with the jet pack
Huge Duke
Start a game in coop or deathmatch mode Enable the quotAll Itemsquot code as well as the quotFriendly Firequot option Have one player shoot the other player with the expander weapon Enable the quotInvincibilityquot code before the first player explodes then disable quotInvincibilityquot
Tiny Duke
Start a game in coop or deathmatch mode Enable the quotAll Itemsquot code as well as the quotFriendly Firequot option Have one player shoot the other player with the shrink weapon Enable the quotInvincibilityquot code then disable quotInvincibilityquot 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
Entering the LARD police station
Locate the tunnel in the Freeway level There is a large box on one side of the tunnel Jump on top of the box and from there jump on to the ledge On the far side of the ledge there is a pair of night vision goggles Jump a little bit above the goggles to enter the vents of the LARD Police station Use the night vision goggles and follow the air ducts and shoot through the fan on the right side of the wall or keep going and break the second fan that also on the right side of the wall Duke may now explore the interior of the LARD Police Station
Hear Buttheads voice
Begin game play on the Duke Burger level Locate the drive thru sign on the outside of the building Approach the quotOrder Herequot sign and press A or move around to the center and back of the sign and press A Buttheads will say quotGo away Were like closedquot
Warp to DukeBurger
At the end of level 1 Gun Crazy in the attic at the first turn there is a short box on the ground Jump on it then turn around to see a secret level entrance If you went to the Auto Destruct button you will hear someone say quotSecret Levelquot
Atomic health amp Scuba gear
In Hotel Hell level go to the aquarium and blow up everything inside Then press all the coral and a hatch containing an atomic health and a scuba gear will open
If you want to visit the hell
Go to hotel hell level and go in the lift and start pressing the open butten like mad And if you do it correctly the lift will shoot of the shaft and go to hell
