A few players took advantage of a menu glitch to work out how to make local co-op in Halo Infinite work. Surprisingly enough, it functions with minimal impact on the cutscenes, enemy spawns, and behavior. The best part is that this is not an exclusive exploit - you can do it yourself. All you need to make local co-op work on Halo Infinite is an Xbox Series S/X as well as an online friend. If you have both, simply follow our step-by-step guide (thanks @HaloCreation).
Navigate your way to the campaign menu and load a save file Click Play and quickly move to your friend list As soon as you see “loading map” appear on the screen, go to your friend list and join a friend Leave Fireteam Select “offline” under the server type in the custom lobby You should be able to connect other controllers and profiles Play away
Keep in mind that Halo Infinite doesn’t support split-screen co-op so 343 could patch away this glitch anytime. Until then, feel free to take advantage of this and schedule Halo night with your friends just like the good ol’ days.