Marathon ‘s Symbiosis update arrives December 8, bringing new PvE and PvP modes, weapons, a Runner shell, and expanded areas to explore on Tau Ceti IV. Today we’ve got first details on the updated Perimeter zone, Expedition mode, and more.

What’s new in Marathon: Symbiosis

Updated Perimeter zone: Fungal growth and alien life have transformed Perimeter, introducing new playable spaces including the underground Burrows and submerged Reservoir. Runners will also encounter the Tick Queen, who lurks deep beneath the surface.

Expedition: Phase 1 of a new PvE-only mode built around a three-run series. Play solo or with a crew, face new combat and environmental challenges without PvP threats, and use Flash Boosts to shape your build during a run.

Deathmatch (Beta): An experimental PvP mode featuring bite-sized 3v3 Team Deathmatch matches.…