There is not a 2 player mode for Halo on Xbox One.
Halo 5 does not have split screen because it is an Xbox One exclusive.
There is no dedicated split-screen mode in Halo 5, but you can use the Xbox One’s second screen to play splitscreen with a friend. To do this, you’ll need to set up your Xbox One so that it recognizes your secondary display as an extension of your primary screen. Once that’s done, you can start playing Halo 5 on your secondary display and your friend will be able to see everything on your primary screen.
Halo 5 does not have local co-op.
Unfortunately, I cannot play Halo 5 Coop.
There are a few ways to play splitscreen on Halo. The simplest way is to use a controller and split the screen in half. Another way is to use a gamepad and have each person control their own character.
Halo 3, Halo: Reach, Halo 4, and Halo 5: Guardians are all split-screen.
Halo 3, Halo: ODST, Halo 4, and Halo 5: Guardians all have couch co-op.
No, Halo Reach does not have split-screen.
Yes, Dirt 5 does have split-screen.