Borderlands 2

"A new era of shoot and loot is about to begin. Play as one of four new vault hunters facing off against a massive new world of creatures, psychos and the evil mastermind, Handsome Jack. Make new friends, arm them with a bazillion weapons and fight alongside them in 4 player co-op on a relentless quest for revenge and redemption across the undiscovered and unpredictable living planet."