A free update for Halo: Campaign Evolved will add the Firefight cooperative mode this winter, as reported by Game Informer and Gematsu. Xbox FanFest attendees will be the first to test the mode, according to the announcement.

Halo Studios director Tahir Hasangjekaj stated the update will let players survive enemy waves in four-player PvE. Details will be shared at Halo Fest in Seattle from December 12-13, per Gematsu and VGC.

The update is free and will launch in winter, according to VGC. Halo: Campaign Evolved was released in July and is available on multiple platforms, as noted by Gematsu and VGC.