Gears of War 3 Unlockables

Unlockable Mutators
UnlockableHow to unlock
Big ExplosionsIn any mode, unlock tehe Hail Mary ribbon 100 times.
Big HeadIn Horde Mode, unlock the Gold Horder Medal.
CometIn Versus Mode, unlock the Gold Shock Trooper Medal.
Enemy RegenerationIn Arcade Mode, unlock the silver Afficianado Medal.
Flower BloodIn Arcade Mode, unlock the silver King of COG Medal
Friendly FireIn Co-op Campaign, complete the co-op campaign with four players.
Infinite AmmoIn Horde Mode, unlock the Combat Engineer ribbon 100 times.
Instagib MeleeIn Beast Mode, play as a wretch and score 200 kills.
Laugh TrackUnlock the Bronze Tour of Duty, For the Horde, I'm a Beast, and Warmonger Medals.
Must Active ReloadUnlock the silver Active Reloader Medal.
PinataIn Beast Mode, unlock the Gold Investor Medal.
Super ReloadIn Versus Mode, unlock the Bronze Master-at-Arms Medal.
VampireIn Versus Mode, unlock the Executioner ribbon 100 times.