Successfully complete the indicated task to unlock the corresponding skin:

Albert Wesker (Resident Evil series): Reach Career <#> Level 20.
Dom Santiago (Gears Of War 3): Successfully complete
Campaign mode.
Frank West (Lost Planet): Have a saved game <#> file from the
original Lost Planet: Extreme Condition/.
Marcus Fenix (Gears Of War 3): Successfully complete Campaign mode.
Servbot Head (Dead Rising): Have a saved game file from /Dead
Rising/.