Bungie has shared a closer look at Symbiosis, the first step in its plans to evolve Marathon. A new gameplay trailer shows off the update’s new PvE and PvP modes, the reworked Perimeter zone and more, ahead of its launch on Wednesday 9 December 2026 (AEDT). The update will be available to all players.
On Tau Ceti IV, Perimeter has been transformed. Fungal growth and alien life have reshaped the zone, opening up new playable spaces such as the underground Burrows and the submerged Reservoir. Something else is waiting further down, with the Tick Queen lurking deep beneath the surface.
For players who would rather avoid other crews, Expedition is a new PvE-only mode built around a series of three runs. It can be played solo or with a crew, and introduces new combat and environmental challenges without the threat of PvP. During a run, Flash Boosts can be used to shape a build. Expedition launches with Phase 1 of the mode.
On the PvP side, Deathmatch is arriving as an experimental mode in beta. Matches are short 3v3 Team Deathmatch bouts in which two crews compete for points, and players do not risk their permanent loadout by taking part.
Between runs, Runners can head to Limbo, a new social space where they can meet up, try out weapons and gear in firing ranges and take each other on in the duelling pit.
The update also adds the Bishop Runner shell, which is designed around the idea of a fast, precise robot that fights with blades. Two new weapons are joining the arsenal as well. The V17 Flamethrower is focused on short-range area denial, and the Maverick brings a new revolver archetype that is designed to feel like a hand cannon.
To coincide with the launch, Open Play Week will run from 9 December until Wednesday 16 December 2026, giving everyone the chance to play Marathon during that period. Players who crew up with friends can also earn a set of limited-time rewards until Tuesday 22 December 2026.
