Note: Enabling the 'Infinite Ammo', 'Instagib', or 'Invincibility' cheat options will prevent Ego points and achievements from being earned.Ĭoncept Arts: Easy difficulty or higher Development Timeline: Easy difficulty or higher Duke 3D Freeze Ray (freeze ray fires bouncing ice projectiles): Normal difficulty or higher Duke Sound Board: Easy difficulty or higher Game Speed (adjust game speed): Normal difficulty or higher Grayscale Mode (black and white graphics): Normal difficulty or higher Head Scale (adjust head size of enemies and NPCs): Easy difficulty or higher Infinite Ammo: Normal difficulty or higher Instagib (enemies killed with one shot and always gib): Normal difficulty or higher Invincibility (no damage from bullets or explosions): Normal difficulty or higher Mirror Mode (graphics are mirrored horizontally): Normal difficulty or higher Movies: Easy difficulty or higher Screenshots: Easy difficulty or higher Triptych Office Photos: Easy difficulty or higher Successfully complete the game on the indicated difficulty to unlock the corresponding cheats and bonuses at the 'Extras' menu.
