Halo 5's 4-Player Co-Op Allows for a Much More Sociable Story - GameSpot

Microsoft explains why it's focusing so heavily on four-player co-op with the upcoming game.
A new entry in the Halo franchise was announced at the Microsoft Press Conference at E3 2013 for the Xbox One.

Halo 5: Guardians, Halo University Wiki

4-player splitscreen co-op runs perfectly on Series X. : r/halo

Why Halo 5 Doesn't Have Split-Screen

Halo 5: Guardians – Xbox One : Microsoft Corporation

Review: Halo 5: Guardians - Slant Magazine

Halo 3: ODST - Wikipedia

Serious Sam Classic: The First Encounter on Steam

Halo 5 Dev Confirms Character Models Are All In-Engine, No Split-Screen Due To 60 FPS

Gamespot PC Game of the Year: Divinity: Original Sin : r/Games

Cooperative play - Halopedia, the Halo wiki

39 Games Like Minecraft Which Games Are Similar to Minecraft?

Halo 5: Guardians Gets New Info About Campaign, Co-op, and Fireteams - GameSpot

Halo: Reach - Longplay 4 Player Co-op (Legendary Campaign) Full Game Walkthrough (No Commentary)

Assembling A Cathedral Out Of A Hurricane — The Making of Halo 2, by Andrew G.