gears of 3

in order to unlock griffin voiced by ice t you have to get an onyx  medal for the big money.
if you beat the game in insane you will unlock a skin but you have to beat it before Dec 21, 2011.

gears of 3

COG Gear: Reach Level 2.

Samantha Byrne: Reach Level 4.

Dizzy Wallin: Reach Level 7.

Jace Stratton: Reach Level 10.

Clayton Carmine: Reach Level 14.

Classic Dom: Reach Level 17.

Classic Cole: Reach Level 23.

Classic Baird: Reach Level 30.

Benjamin Carmine: Reach Level 34.

Civilian Anya: Reach Level 45.

Colonel Hoffman: Reach Level 50.

Anthony Carmine: Reach Level 75.