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

I'm trying to play the co-op versus or horde mode on split screen PC using two controllers but it is not giving me the option. I am able to activate the guest account on co-op campaign but versus

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

Gears of War 3 - Wikipedia

Gears of War 4's Horde mode is more intense than ever before

Gears of War 3 Review - Reviewed

xbox one - How do I set up split-screen with guest account on

Gears of War: Ultimate Edition for Xbox One Review

Gears 5 Goes Gold, Horde & Campaign Modes Reveal Set for Gamescom

Gears of War 4: Ultimate Edition

How many players is Gears 5 Horde?

Gears of War 4 will have split-screen co-op on PC, but not competitive

Why Gears 5 Has 3-Player Co-op But Not 4-Player Co-op

Is Gears 5 Crossplay? Cross-Platform Availability and Limitations

Gears of War - part 1 - Split screen Co-op playthrough

Gears of War 2 - Wikipedia

Co-Optimus - News - Gears 5 Co-Op FAQ