In multiplayer, you are able to play as Marcus Fenix and Domonic Santiago from Gears of War 2 for the Xbox 360, a Monster Hunter in Rathalos Armor from Monster Hunter, Helghast and a Scout from Killzone for the PS3. Wesker from Resident Evil 5, Frank West from Dead Rising, and a Teddy Bear Backpack and Servbot from Mega Man Legends can be used in both Xbox 360 and PS3. These skins are all available in the campaign as well, but only after beating it once.
Contributed by Psychospacecow