Unlockable Challenge Room Codes

At the title screen (not the main menu) enter these codes to access a few hidden Challenge Rooms. They will appear at the end of the Challenge Room list. Unfortunately you must enter the codes each time the game boots up and only one code can be active at a time. These codes only work on English versions of the game.

Code	Effect
Down, Up, Down, Up, Left, L1, Square, L1, Square, Triangle, Start	EuroGamer Challenge Room
Right, Down, Left, Up, L1, R1, Triangle, Triangle, X, X, Start	Fan Made (Arron Sedillo) Challenge Room
R1, Triangle, Square, Square, Up, Down, L1, L1, Up, Down, Start	GamesRadar Challenge Room
Up, Down, Triangle, Square, Square, Triangle, Down, Up, L1, L1, Start	IGN Challenge Room

 

FOR XBOX360

Secret Challenge Rooms

At the menu screen where it says "Press Start," enter these codes, quickly.

Code	Effect
Right, Down, Left, Up, Left Bumper, Right Bumper, Y, Y, X, X, Start	Aaron Sedillo's Room
Right Bumper, Y, X, X, Up, Down, Left Bumper, Left Bumper, Up, Down, Start	GamesRadar Challenge Room
Down, Up, Down, Up, Left, LB, X, LB, X, Y, Start	Unlocks Eurogamer Challenge Room
Up, Down, Y, X, X, Y, Down, Up, LB, LB, Start	Unlocks IGN Challenge Room
Left Bumper, X, X, X, Right, Down, Left Bumper, Left, Y, Down, Start	Unlocks the Major Nelson Challenge Room

Fake Pause / Invincibility

At any point in the game, press the Guide button and immediately press Back. You must press guide a fraction of a second BEFORE you press back. The guide will come up like normal so leave the guide and go back to the game. You'll notice that the game is paused yet everything is still moving! Enemies will still fire at you and everything will move except you. You can't move of course but an interesting property is that you cannot take damage or be affected by ANYTHING. That's right! You are invincible while it's paused! Use this trick on the Fabricator for an easy win! You can also start a swing and do the glitch to fly through electrical gates or other obstacles without taking damage!

Unlock Super Hard Difficulty

Beat the game on any difficulty.

 

Cheat Mode
The following codes require an Xbox 360 controller to be activated. They can also be enabled on a standard gamepad by translating the buttons. 

Arron Sedillo Challenge Room
Press Right, Down, Left, Up, LB, RB, Y, Y, A, A, Start at the "Press Start" screen to unlock the fan made challenge room at the "Challenge Room" menu. 

EuroGamer Challenge Room
Press Down, Up, Down, Up, Left, LB, X, LB, X, Y, Start at the "Press Start" screen to unlock the EuroGamer challenge room at the "Challenge Room" menu. 

GamesRadar Challenge Room
Press RB, Y, X, X, Up, Down, LB, LB, Up, Down, Start at the "Press Start" screen to unlock the GamesRadar challenge room at the "Challenge Room" menu. 

IGN Challenge Room
Press Up, Down, Y, X, X, Y, Down, Up, LB, LB, Start at the "Press Start" screen to unlock the IGN challenge room at the "Challenge Room" menu.