Cameron Waldrop
The exact information is written in a Halo Waypoint blog post:
While co-op is a massive deal, it isn’t the only new thing headed to Halo Infinite that other games in the franchise had at launch. Players will finally be able to replay missions whenever they want through use of the Tac-Map. This will make a difference to all of those who missed collectibles throughout the campaign and weren’t wanting to do a whole new playthrough.
So not only will you be able to play with friends, but you won’t have to reset all of your progress to do so, which will be a nice change.
Halo Infinite is available for PC, Xbox One, and Xbox Series X|S. Game Pass owners can play it for free.
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