Refresh Whenever you see a toilet, let Duke refresh himself by pressing B. Booby Trap When in the NYC level, walk by the "Booby Trap" strip joint in the alley were you meet 3 aliens. Behind the first column to the left, there is a grated tunnel-way. Press B to crouch and shoot the grate, then crawl in and save the two babes! Big Gun Mode Kill all opponents in level 3, "Nuclear Winter", to unlock the cheat option for big gun mode. Big Head Mode Rescue all babes in level 2, "Liberty Or Death", to unlock the cheat option for big head mode. FPS Mode and Action Mode When you beat the game you get these two modes. First Person Mode puts you in the perspective like in Duke Nuk'em 3D. Action Mode makes you have 1-hit kills. Flat Shade Map Obtain all secrets in the secret "Wetworld", level to unlock the cheat option for flat shade map. High Speed Zombies Rescue all babes in level 8, "Dry Town", to unlock the cheat option for high speed zombies. Ice Skin Rescue all babes in level 5, "Fallout", to unlock the cheat option for ice skin. Maximum Blaster Ammunition Kill all opponents in level 9, "Jailbreak", to unlock the cheat option for maximum blaster ammunition. Maximum Freezer Ammunition Kill all opponents in level 20, "The Brothers Nukem", to unlock the cheat option for maximum freezer ammunition. Maximum Gamma Ammunition Rescue all babes in level 21, "Alien Mothership", to unlock the cheat option for maximum gamma ammunition. Maximum Gatling Gun Ammunition Kill all opponents in level 16, "Hydrogen Bomb", to unlock the cheat option for maximum gatling gun ammunition. Maximum Revolver Ammunition Kill all opponents in level 12, "Probing The Depths", to unlock the cheat option for maximum revolver ammunition. Maximum Rifle Ammunition Rescue all babes in level 11, "Ft. Roswell", to unlock the cheat option for maximum rifle ammunition. Maximum SMG Ammunition Obtain all secrets in level 15, "Dawn Of The Duke", to unlock the cheat option for maximum SMG ammunition. Maximum Sawn-Off Shotgun Ammunition Kill all opponents in level 13, "Whitechapel Killings", to unlock the cheat option for maximum sawn-off shotgun ammunition. Maximum Shotgun Ammunition Rescue all babes in level 10, "Up Ship Creek", to unlock the cheat option for maximum shotgun ammunition. Maximum Sniper Ammunition Rescue all babes in the "Going Down" secret level to unlock the cheat option for maximum sniper ammunition. Maximum Volt C. Ammunition Obtain all secrets in level 17, "The Rack", to unlock the cheat option for maximum Volt C. ammunition. Regain Energy When you shoot a fire hydrant in the game stand next to it and press the A button.This will replenish your health to 100. Titanic Level To access the Titanic level "GOING DOWN" find all the time machine pieces before you get to "THE RACK" and a second exit portal should appear in the room just off the first. Weather Obtain all secrets in level 6, "Under Siege", to unlock the cheat option for weather. Wetworld Level To access the "WETWORLD" level play through Level 3 'NUCLEAR WINTER' until you reach the railroad tracks leading to the communicator. You have to power up and drop off onto the roof below. Here you will see a Medi Kit. Now jump off this roof into the water (which is only on 1 side) and swim to a floating platform where you will see the level exit. First Person Mode (The Easy Way) Press Down on the D-Pad, Up on the D-Pad, L, B, Z, Left on the D-Pad, C-Up, C-Right, C-Left, and Z at the "Press Start" screen. If you do it right, you should hear a horse neigh. All Weapons and Infinite Ammo Press A, B, A, C-UP, C-DOWN, L, A. at the Main Menu. Freeze Thrower with Infinite Ammo (The Easy Way) Press DOWN on the D-Pad, UP on the D-Pad, A, L, R, Z at the Main Menu. Action Nukem: Kill Opponents in One Hit in 1 Player Mode Press Down, Down, A, Z, Z, Left, A at the Main Menu. 30-30 Rifle with Infinite Ammo (The Easy Way) Press UP-C, DOWN-C, LEFT-C, RIGHT-C, L, R at the Main Menu.