Arron Sedillo challenge room:
     Press  Right,  Down,  Left, Up, L1, R1, Triangle, Triangle, X, X,
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, L1, Square, L1, Square, Triangle,
Start  at  the  "Press Start" screen to unlock the EuroGamer challenge
room at the "Challenge Room" menu.

GamesRadar challenge room:
     Press  R1,  Triangle, Square, Square, Up, Down, L1, L1, 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, Triangle, Square, Square, Triangle, Down, Up, L1,
L1, Start at the "Press Start" screen to unlock the IGN challenge room
at the "Challenge Room" menu.