How do I set up split-screen with guest account on Gears of War Ultimate?
Solution 1:
While both users are signed in you have to be at the main menu, have the second player or guest player press the start button and that should load their user and after that you should be good to go to select campaign or versus and so on. If that don't work, after you already have both users signed in, quit the game and restart the game. This being a Xbox 360 game originally, you will need to press the start and options buttons on ones remote to set up said guest account on the Xbox one.