X-Men: The Official Game

Bonus costumes:
Collect all Weapon X files with a character to unlock their street costume.
Collect all Sentinal Techs with a character to unlock their comic costume.

Danger Room missions:
Successfully complete an Act with a character to unlock one of
their Danger Room mission. Successfully complete all three Acts
with a character to unlock all three of their bonus Danger Room missions.

Iceman Danger Room missions:
At the Cerebro Files menu, press:
Right(2), Left(2), Down, Up, Down, Up, Start

Nightcrawler Danger Room missions:
At the Cerebro Files menu, press:
Up(2), Down(2), Left, Right, Left, Right, Start

Wolverine Danger Room missions:
At the Cerebro Files menu, press:
Down(2), Up(2), Right, Left, Right, Left, Start

 