Halo Infinite multiplayer has cross-platform support for PC and Xbox - Polygon

Matt Booty, Microsoft’s head of Xbox Game Studios, said on April 29, 2021, that Halo Infinite will support cross-play and cross-progression among Xbox Series X, Windows PC, and Xbox One when the game launches in the fall of 2021.

You cannot replay campaign missions in Halo Infinite, and there are missables (skulls, audio logs) : r/halo

Polygon: What's next for Halo?With 343 Industries in flux, Microsoft faces an uncertain path for its prized franchise : r/XboxSeriesX

We should talk about Halo Infinite's not quite next-gen premiere

Halo: Reach PC technical review - Reaching for the stars but not quite getting there

Mass Effect: Andromeda – New patch to solve animation flaws

Halo: Combat Evolved - Wikipedia

Xbox One - Wikipedia

Halo 3, Halo Alpha

All Microsoft-Published Games Will Now Be Xbox Play Anywhere : r/Games

Doublejump Digest: July 18, 2021 - Doublejump