According to Spencer the reason the newest game in the series from 343 Industries doesnt have split-screen is because fewer older people actually make use of split-screen gameplay and when they do play games like Halo 5, its usually via Xbox Live. Its one of the advantages that Xbox Live obviously offers.

How do I add a second controller to Halo 5?

Follow these simple steps in order to do it:Start the game.Select Campaign.Choose Co-op.Invite friends.Start playing.Oct 28, 2015

Will Halo Infinite have split-screen co-op campaign?

Two Betrayals. Halo Infinite wont have campaign co-op or Forge at launch, developer 343 has announced. The two much-loved modes of play have been delayed.