X-Men - The Official Game

Bonus costumes:
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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:
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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:
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At the Cerebro Files menu, press Right(2), Left(2), Down, Up, Down, Up, Start to unlock
the bonus Iceman Danger Room missions.

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

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