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

The feature was a "labor of love" and added in wake of feedback from Gears of War Ultimate Edition.
Gears of War 4 is the next installment in the Gears of War series and is exclusive to the Xbox One.

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

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