Unlock extra options for next playthroughBy completing the game on any difficulty, you will get to unlock extra options for your next playthough! (The options labeled "CHEAT" will lock achievements and Ego points.)
Unlockable How to Unlock Duke 3D Freeze Ray Freeze ray will fire bouncing ice projectiles (SP only). Game Speed Adjust game speed (SP only). Grayscale Mode Draw the game in grayscale (SP only). Head Scale Adjust head size of enemies and NPCs (SP only). Infinite Ammo Never run out of ammo (SP only). CHEAT. Instagib Enemies die in 1 shot and always gib (SP only). CHEAT. Invincibility Take no damage from bullets or explosions (SP only). CHEAT. Mirror Mode Draw the game mirrored horizontally (SP only).
Weapon clothing unlocksThese are clothing items unlocked through multi-player weapon-specific challenges to use in the changing room to customize your Duke for MP.
Unlockable How to Unlock Backwards Baseball Cap Get 250 kills with the Shotgun (Burger Face III) Baseball Cap Get 75 kills with pipe bombs (Splatter king III) Brain Sucker Get 250 kills with the Enforcer (Laser Seeking Missiles III) Canadian Flag Logo Get 75 kills with the Garter Pistol (Tiny But Deadly III) Cheese Hat Get 250 kills with the Ripper (Swiss Cheese III) Detonator Logo Get 250 kills with the Rocket Launcher (Boom Goes the Weasel III) Hoplite Helmet Get 75 melee kills (Punchy McPuncher III) I Shot Stupid Logo Get 250 kills with the Railgun (Right In the Eye III) Jester Hat Get 75 kills with trip mines (Watch your step III) Military Hat Get 250 kills with the Pistol (Size Doesn't Matter III) Retro Duke Logo Get 250 kills with the Devestator (Meat Grinder III) Ski Goggles Execute a frozen player 75 times (Ice to See You III) Tie-Dye Shirt Get 250 kills with the AT laser (Medium Rare III) Uncle Sam Hat Stomp on 75 enemies (Pee Wee Vermin III) Wolf Logo Get 75 kills with Steroids (Roid Rage III) WTF Logo Get 75 kills with exploding barrels (Smile You Son of a Bitch III)
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