Co-Op - Gears of War 3 Guide - IGN

Co-Op campaign is a feature included in every Gears of War Game in which multiple people can team up and play through the story cooperatively. It can be played

Co-Optimus - Review - Gears of War 3 Co-Op Review

Multiplayer Unlockables - Gears of War 3 Guide - IGN

Gears of War 5 Guide - IGN

Gears of War: Ultimate Edition [Gameplay] - IGN

Every Gears of War Game Will Be Backward Compatible on Xbox One : r/xboxone

Gears of War 3 - IGN

Gears of war 3 has 3 player local coop. For campaign only though. And it's buggy. : r/GearsOfWar

Gears of War 3 - IGN

Gears - Gears of War 3 Guide - IGN