Entry Location:
Enter these codes in the main menu quickly. You can only have one Challenge Room unlocked at a time, so chose wisely.

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

Submitted By: Some People

Achievements

A Real Challenge (20) - Acquire at least one star in each of the Challenge Rooms 1 - 56.
Cat burglar (20) - Get to the boss of Area 05 within one minute and thirty seconds.
Clean as a whistle (20) - Clear Area 02 without touching a slime blob.
Elite Commando (5) - Clear the game on Super Hard.
Faster Than a Speeding Bullet (20) - Block 100 projectiles using the claw.
H4><0rz (10) - Hack through all the hacking games on Hard.
Intel Collector (5) - Acquire all database logs.
Meet with annihilation (20) - Kill all foot soldiers and enemy trucks on a Meet With Enemy sequence.
One Dozen Yashichis (20) - Collect all twelve hidden Yashichis - one from each of Area 01 - 12.
Pacifist Pride (20) - Clear any of Area 1 - 12 without firing your gun.
Private Arsenal (20) - Obtain every weapon and weapon upgrade.
The Emperor's New Clothes (20) - Obtain the Shin Guards, the Bulletproof Vest and the Helmet.

Submitted By: Riggins

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