X-Men: The Official Game cheats and cheat codes for PC

Unlock alternate comic outfit:
Get all Sentinal Techs with a playing character to unlock his/her alternate 
comic costume. 

Unlock alternate street outfit:
Get all Weapon X files with a playing character to unlock his/her alternate 
street costume. 

Unlock Danger Room missions:
Collect all Sentinel files and Weapon X files with all characters to unlock 
all nine Danger Room missions .

Finding Tech Pieces on timed mission:
First play on novice level and find all 6 Tech Pieces location, then 
distribute mutation and save the game. Then play on higher levels
to gain the missing mutations. This way, you can save lots of time.