Four-player Gears of War 3 co-op campaign confirmed - GameSpot

Epic Games design director Cliff Bleszinski confirms next April's sci-fi shooter series finale will double number of players in cooperative mode; female soldier confirmed as Anya.
Gears of War 3 is the conclusion to the Gears of War saga.

Why Gears of War 5 Won't Have 4-Player Co-op in Campaign

PUBG: Battlegrounds - Wikipedia

Gears of War 3 Preview: Updated Multiplayer Hands-On - GameSpot

Gears of war 3 has 3 player local coop. For campaign only though

How to play co-op split screen versus/horde on pc in Gears of War

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

News - Steam Community Announcements

Gears of War 4 will have split-screen for all game modes – Destructoid

Gears of War 4 Review-in-Progress

Gears of War 3 Campaign Preview - GameSpot

Talk:Gears of War 3, Gears of War Wiki

Gears of War 4 Has Split-Screen Campaign Co-Op on PC - GameSpot

Looking Back to 2011 with Gears of War 3 - Finishing the Fight