On November 8, Halo Infinite's winter update will bring network campaign co-op, the Forge beta, and several new multiplayer additions.

Campaign Co-Op will let players gain progress all together. Entering into a session will place the group at the point where the furthest behind player is. Every collectable will also be obtainable for every player that hasn't gotten it yet. In setup, players can select skulls from the ones that every player has unlocked. Players can now also replay missions, going back to unlock the skulls or audiologs they didn't grab before.

The Forge beta allows players to host up to 7,000 objects per map, whereas Halo 5 allowed 1,600. Users can scale objects, making small ones large and large ones small. It also includes a visual scripting language, letting players tinker with small variables. Forge will launch with six canvases, meaning map backgrounds, but will receive more with time. Bots are supported in Forge for the first time. Every project will also save and go forward into future versions of Forge.