X-Men: The Official Game

Unlock Score Attack mode:
Finish level 1 in Story mode to unlock the Score Attack mode.

Unlock Boss Rush mode:
Finish Story mode once to unlock the Boss Rush mode.

Unlock Survival mode:
Finish Story mode once to unlock the Survival mode.

Xiaolin Showdown

Unlock Warrior costume:
Achieve Martial Artist rank to unlock the Warrior costume.

Unlock Monk costume:
Achieve Monk rank to unlock the Monk costume.

Unlock Robot costume:
Achieve Wudai rank to unlock the Robot costume.

Unlock Street costume:
Achieve Grass Hopper rank to unlock the Street costume.