X-Men: Next Dimension
Xbox

Master code:

Hold L, then press Right(2), Left(2), Down, Up, B at the main menu. A message will be spoken to confirm correct code entry.

Fight as Bastion:

Successfully complete the game story mode as Magneto without losing any matches to face Bastion. Defeat Bastion to unlock him as a selectable character.

Fight as Bishop:

Successfully complete the game in arcade mode as Gambit to unlock Bishop as a selectable character.

Fight as Blob:

Successfully complete the game in arcade mode as Bishop to unlock Blob as a selectable character.

Fight as Psylocke:

Successfully complete the game in arcade mode as Betsy to unlock Psylocke as a selectable character.

Fight as Dark Phoenix:

Successfully complete the game in arcade mode as Phoenix to unlock Dark Phoenix as a selectable character. Alternately, successfully complete the game in story mode as Magneto.

Fight as Sentinel A:

Successfully complete the game in arcade mode as Cyclops.

Fight as Sentinel B:

Win twenty matches in survival mode.

Third costume:

Successfully complete the game in story mode to unlock that character's third costume.

Fourth costume:

Win twenty matches in survival mode with all characters.

Fifth costume:

Successfully complete the game in arcade mode under the hard difficulty setting with all characters.

Sixth costume:

Defeat all ten fighters in time attack mode in under fifteen minutes to unlock the sixth costume for the fighter you selected