All of these executions are available in the campaign, but you have to unlock them in multiplayer mode by getting a specific number of kills with each weapon. The execution is triggered when you hold down 'Y' when approaching a downed enemy. We thought it would be helpful for those that have moved onto these fragtastic modes to know how the various weapons-related skins and executions are unlocked, so we present to you our Gears of War 3 Weapon Executions & Skins Guide!Įvery weapon in Gears of War 3 has a unique execution associated with it. By now you've probably conquered the Gears of War 3 campaign and have moved onto the multiplayer modes.