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.

Through Game Pass, Cross-Saves and Cross-Play between Xbox and Windows 10 PC will be possible. : r/PlayAvengers

Halo Infinite, Winter Update

Is Halo Infinite Cross Platform? Everything You Should Know - MiniTool Partition Wizard

Halo Infinite will support crossplay and cross-progression on Xbox and PC - The Verge

Is Halo Infinite Cross Platform? Everything You Should Know - MiniTool Partition Wizard

Halo Infinite' live service issues linger, and players are losing interest - The Washington Post

Minecraft Will Be The First Crossplay Game Between Xbox One And Ps4 : r/Games

Halo: Combat Evolved Anniversary : Microsoft Corporation: Video Games

Xbox players are fed up with forced crossplay against PC gamers - The Verge

Polygon Rumor: Microsoft looking to acquire publishers. EA, Valve make shortlist : r/xboxone

The Pros and Cons of Halo Infinite Crossplay

Halo Infinite Preview - How Halo Infinite Serves As A Spiritual Reboot - Game Informer