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.

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Games of 2021: Our most anticipated video games for PC, PS5, Switch, and Xbox Series X - Polygon

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