Cheat mode
At the main menu, highlight the "Extra Content" option and press R to display the "Password Entry" screen. Enter one of the following codes to unlock the corresponding cheat. Then, choose the "Mission Select" option in the "Extra Content" menu. Start the game through that option after toggling the desired cheats on or off.

All powers
Enter 537893 as a password. Alternately, successfully complete the game.

Infinite ammunition
Enter 978945 as a password.

Bulletproof
Enter 548975 as a password.

Super Psi
Enter 456456 as a password.

No head
Enter 987978 as a password.

Arcade mode
Enter 05051979 as a password. Alternately, successfully complete the game to unlock the "Arcade" option at the "Extra Content" menu.

Co-op mode
Enter 07041979 as a password.

Survival mode
Enter 7734206 as a password. Alternately, find the Gnome in level 3 to unlock the "Survival" option at the "Extra Content" menu.

Dark mode
Enter 465486 as a password.

Barret Training
Enter 196006 as a password.

Aura Pool mission
Enter 659785 as a password. Alternately, find the Gnome in level 8 to unlock the Aura Pool mission.

Bottomless Pit mission
Enter 154897 as a password. Alternately, find the Gnome in level 4 to unlock the Bottomless Pit mission.

Bouncy Bouncy mission
Enter 568789 as a password. Alternately, find the Gnome in level 2 to unlock the Bouncy Bouncy mission.

Gasoline mission
Enter 9442662 as a password. Alternately, find the Gnome in level 6 to unlock the Gasoline mission.

Gear Gauntlet mission
Enter 154684 as a password. Alternately, find the Gnome in level 3 to unlock the Gear Gauntlet mission.

Gnomotron mission
Enter 456878 as a password. Alternately, find all Gnome in the game to unlock the Gnomotron mission.

Panic Room mission
Enter 76635766 as a password. Alternately, find the Gnome in level 3 to unlock the Panic Room mission.

Pitfall mission
Enter 05120926 as a password. Alternately, find the Gnome in level 4 to unlock the Pitfall mission.

Psi Pool mission
Enter 565485 as a password. Alternately, find the Gnome in level 6 to unlock the Psi Pool mission.

Stop Lights mission
Enter 945678 as a password. Alternately, find the Gnome in level 7 to unlock the Stop Lights mission.

Tip The Buddha mission
Enter 428584 as a password. Alternately, find the Gnome in level 1 to unlock the Tip The Buddha mission.

TK Alley mission
Enter 090702 as a password. Alternately, find the Gnome in level 2 to unlock the TK Alley mission.

Up And Over mission
Enter 020615 as a password. Alternately, find the Gnome in level 4 to unlock the Up And Over mission.

Barrett costume
Enter 497878 as a password. Alternately, successfully complete the game on the elite difficulty setting to unlock the Barrett costume.

Bikini Pyro costume
Enter 135454 as a password. Alternately, successfully complete the game on the elite difficulty setting to unlock the Bikini Pyro costume.

Burnt Soldier costume
Enter 454566 as a password. Alternately, successfully complete the game on the normal difficulty setting to unlock the Burnt Soldier costume.

Clown General costume
Enter 431644 as a password. Alternately, collect all six orbs in the General Boss battle to unlock the Clown General costume.

Dockworker costume
Enter 364654 as a password. Alternately, successfully complete the game on the easy difficulty setting to unlock the Dockworker costume.

Dragon Wei Lu costume
Enter 978789 as a password. Alternately, successfully complete the game on the hard difficulty setting to unlock the Dragon Wei Lu costume.

Fetish Pyro costume
Enter 231644 as a password to unlock the Fetish Pyro costume.

General costume
Enter 459797 as a password. Alternately, successfully complete the game on the elite difficulty setting to unlock the General costume.

Jack costume
Enter 698798 as a password. Alternately, successfully complete the game on the elite difficulty setting to unlock the Jack costume.

Jov costume
Enter 468987 as a password. Alternately, successfully complete the game on the elite difficulty setting to unlock the Jov costume.

Komiko costume
Enter 978798 as a password. Alternately, successfully complete the game on the normal difficulty setting to unlock the Komiko costume.

Labcoat costume
Enter 998789 as a password. Alternately, successfully complete the game on the easy difficulty setting to unlock the Labcoat costume.

Marlena Pyro costume
Enter 489788 as a password. Alternately, successfully complete the game on the elite difficulty setting to unlock the Marlena Pyro costume.

MP1 costume
Enter 321646 as a password. Alternately, successfully complete the game on the easy difficulty setting to unlock the MP1 costume.

MP2 costume
Enter 698799 as a password. Alternately, successfully complete the game on the normal difficulty setting to unlock the MP2 costume.

MP3 costume
Enter 654659 as a password. Alternately, successfully complete the game on the hard difficulty setting to unlock the MP3 costume.

Psi Sara costume
Enter 468799 as a password. Alternately, successfully complete the game on the hard difficulty setting to unlock the Psi Sara costume.

Sara costume
Enter 135488 as a password. Alternately, successfully complete the game on the normal difficulty setting to unlock the Sara costume.

Saranae costume
Enter 65496873 as a password to unlock the Saranae costume.

Scorpion costume
Enter 546546 as a password to unlock the Scorpion costume.

Stealth Nick costume
Enter 456498 as a password. Alternately, successfully complete the game on the elite difficulty setting to unlock the Stealth Nick costume.

Suicide Sara costume
Enter 678999 as a password. Alternately, successfully complete the game on the hard difficulty setting to unlock the Suicide Sara costume.

Tonya costume
Enter 136876 as a password. Alternately, successfully complete the game on the hard difficulty setting to unlock the Tonya costume.

Training Barret 1 costume
Enter 196001 as a password to unlock the Training Barret 1 costume.

Training Barret 2 costume
Enter 196002 as a password to unlock the Training Barret 2 costume.

Training Barret 3 costume
Enter 196003 as a password to unlock the Training Barret 3 costume.

Training Barret 4 costume
Enter 196004 as a password to unlock the Training Barret 4 costume.

Training Barret 5 costume
Enter 196005 as a password to unlock the Training Barret 5 costume.

Training Barret 6 costume
Enter 196006 as a password to unlock the Training Barret 6 costume.

Training Nick costume
Enter 564689 as a password. Alternately, successfully complete the game on the easy difficulty setting to unlock the Training Nick costume.

Tranquility Wei Lu costume
Enter 654654 as a password to unlock the Tranquility Wei Lu costume.

UN Soldier costume
Enter 365498 as a password. Alternately, successfully complete the game on the easy difficulty setting to unlock the UN Soldier costume.

Urban Nick costume
Enter 484646 as a password. Alternately, successfully complete the game on the normal difficulty setting to unlock the Urban Nick costume.

Wasteland Nick costume
Enter 975466 as a password. Alternately, successfully complete the game on the hard difficulty setting to unlock the Wasteland Nick costume.

Wei Lu costume
Enter 231324 as a password. Alternately, successfully complete the game on the normal difficulty setting to unlock the Wei Lu costume.