Marathon is changing direction with permanent PvE, 3v3 Deathmatch and a free play week on December 8

The tension that makes an extraction shooter exciting can also be what discourages new players. An unexpected encounter with an experienced enemy team can abruptly end a promising expedition, taking valuable equipment with it. Bungie wants Marathon to offer more ways to engage with its world without removing the defining elements of its original design. The Symbiosis presentation, published November 10, provides concrete details about that new direction. Launching December 8, the update introduces activities that do not always involve competing against hostile human players. The announcement matters because Bungie has publicly acknowledged that Marathon did not attract as many players as the studio had hoped. In September, the developer described plans to expand beyond the limitations of a strictly competitive extraction experience. Symbiosis is intended to deliver the first substantial playable results of that strategy.

Expedition removes hostile players from the equation

The central addition is Expedition, described by Bungie as phase one of Marathon's permanent PvE experience. Rather than entering an extraction environment populated by rival human teams, players will confront AI-controlled enemies and environmental challenges. Expedition can be played solo or with a crew, allowing people to explore at their preferred pace. Each expedition is organized around a series of three runs. Bungie has also announced Flash Boosts, temporary upgrades that let players adapt their builds during an expedition.

The structure introduces a roguelite element to Marathon. Initial preparation still matters, but the upgrades and decisions made during a run can change a character's options as the experience progresses. Bungie has not yet provided a complete breakdown of rewards, failure conditions or every progression rule. The studio describes the December version as a first phase that will continue evolving. The most significant confirmed difference is nevertheless clear: players will have a permanent activity built around exploration and combat without the possibility of being attacked by other human crews.

Perimeter becomes a more alien environment

Symbiosis also brings a substantial environmental update to Perimeter, one of Marathon's existing destinations. Fungal growth and extraterrestrial life have transformed parts of the landscape. New routes lead into the underground Burrows and the flooded Reservoir, creating additional spaces to explore. Bungie wants the area to develop a stronger identity. Previously, the studio considered Perimeter less distinctive and less rewarding to explore than some of Marathon's other zones.

Changing the landscape only matters if it also creates interesting decisions. New routes, environmental hazards and valuable discoveries will need to encourage different approaches to exploration. The most dramatic announced addition is the Tick Queen, a huge creature lurking beneath the surface of Tau Ceti IV. Bungie positions the encounter as a major challenge, but the exact combat mechanics and rewards have not yet been fully detailed. Players will have to wait until December to discover what defeating it actually requires.

Promotional imagery of Perimeter's transformed fungal environment. The redesigned zone is scheduled to arrive with Symbiosis on December 8.

Deathmatch offers 3v3 combat without risking permanent gear

Bungie is not abandoning competitive multiplayer. Symbiosis introduces Deathmatch, an experimental PvP mode in beta featuring two teams of three players competing to earn points. Unlike the traditional extraction experience, these matches will not put players' permanent loadouts at risk. That difference could substantially change how people approach combat. Losing a fight feels very different when it does not also mean losing equipment collected during earlier expeditions.

The shorter format should make Deathmatch useful for practicing gunplay, experimenting with weapons or simply enjoying direct competition without committing to a longer extraction run. However, Bungie is explicitly treating the mode as an experiment rather than a finished competitive format with permanently fixed rules. Expedition and Deathmatch therefore pursue complementary goals: more cooperative exploration against AI threats on one side, and faster, lower-risk PvP on the other.

Bishop introduces a fast, blade-focused Runner

A new Runner shell named Bishop joins the roster. Bungie describes Bishop as a fast, precise combat robot built around blade attacks, surprise and devastating bursts of close-range damage. Rather than emphasizing defensive endurance, the shell is intended to reward mobility and carefully timed aggression. That design could introduce new possibilities for team composition, particularly when a crew needs someone capable of exploiting an opening or closing the distance quickly. Its actual effectiveness will depend on the final ability set and balance.

Two weapons are also confirmed. The V17 Flamethrower specializes in short-range area denial, while the Maverick introduces a revolver archetype intended to feel like a powerful hand cannon. Their potential tactical roles are different. One could make narrow routes dangerous to cross, while the other emphasizes individual shots from a compact weapon. Bungie has not yet released a complete set of weapon statistics that would support definitive comparisons with Marathon's existing arsenal.

Official Marathon artwork showing its cybernetic Runners. Symbiosis will add Bishop and new weapons to the existing roster.

Limbo gives players room to practice

The update also adds Limbo, a social space where Runners can gather before entering more dangerous activities. It includes firing ranges for testing weapons and equipment, along with a dueling pit where players can challenge one another. The addition responds to a problem Bungie has acknowledged directly: Marathon currently asks newcomers to learn too much, too quickly. Understanding Runner shells, weapon behavior, equipment and extraction rules can demand considerable knowledge before a player successfully completes a run.

A dedicated practice environment should provide a more comfortable way to experiment without immediately putting valuable equipment on the line. Limbo may also help players meet others and prepare crews, although its long-term importance will depend on how naturally the community incorporates it into regular play. It is not simply another combat map. Its value lies partly in making Marathon's systems easier to understand.

Everyone can try Marathon during Open Play Week

Bungie has confirmed an Open Play Week running December 8–15, 2026. During this period, players will be able to download and experience Marathon without purchasing the game, including the new Expedition mode, Bishop and the updated Perimeter zone. This is a temporary trial rather than a permanent transition to free-to-play. Players wishing to continue after the event will need to purchase Marathon.

Importantly, Bungie says that progression and items earned during the trial will carry over if a player buys the game afterward. A separate Crew Up event will run from December 8 through December 22, offering cosmetic rewards for completing team-based challenges. These challenges require at least two participating players. They cannot all be completed solo. That restriction applies to Crew Up objectives, not Expedition itself, which Bungie explicitly says can be played alone.

An internet connection remains necessary, and applicable console multiplayer subscription requirements still apply. Marathon supports cross-play and cross-save, with the usual account-linking and game ownership requirements for using different platforms. The free trial therefore removes the initial purchase requirement during the event, but it does not eliminate every technical or platform condition.

Bungie's larger transformation continues into 2027

Symbiosis is not the endpoint of Marathon's planned changes. Since September, Bungie has described a broader strategy aimed at supporting different playstyles instead of building the entire experience around a single extraction loop. The first step was October's Nightfall Refresh, which focused on progression, rewards and improvements to the existing game. December will introduce permanent PvE, new social features and a larger Perimeter. A much more extensive evolution is currently planned for March 2027, including interconnected PvE, PvP and PvPvE activities, deeper Runner shell progression, additional narrative quests, new enemies and another playable zone.

Those March features belong to the future roadmap. They are not all included in the December 8 update. There is also a design challenge ahead. Offering several distinct modes may appeal to more types of players, but Bungie will need to ensure that each activity remains worthwhile and that the overall community does not become excessively fragmented. That balance will be crucial to Marathon's longer-term development.

A second chance that still has to prove itself

Symbiosis addresses several of the concerns surrounding Marathon since launch. Players who want exploration without hostile human opposition will have Expedition. Those looking for immediate competitive action can try Deathmatch. Newcomers will gain a place to practice through Limbo. The Perimeter overhaul, Bishop and new weapons also provide fresh material for existing players.

However, a permanent PvE mode is not automatically a compelling long-term activity, and a lower-risk Deathmatch format does not guarantee strong competitive balance. The December trial will provide an important opportunity to judge these changes in practice. Bungie is not merely inviting former players back; it is also trying to introduce Marathon to people who were previously discouraged by its demanding extraction formula. On December 8, the question will no longer be whether Bungie understands what players have been asking for. It will be whether Symbiosis delivers a convincing response.