Marathon’s Vault Breaker Arrives as Bungie’s Bigger Bet Keeps Faltering

Bungie added a PvE-only mode to Marathon on July 21, a two-week experiment called Vault Breaker that lets Runners raid the game’s endgame vault without ever running into another player. The mid-season patch also nerfs a handful of weapons and caps grenade spam. It lands five weeks after Sony’s most recent round of layoffs tore through the studio behind it.

Marathon was built and marketed as a hardcore PvPvE extraction shooter, one where the threat of a rival squad stealing your loot was the entire point. Its most talked about new feature removes that threat completely, a trial run for a permanent PvE mode Bungie hopes to ship with Season 3 in September.

Vault Breaker Turns the Endgame Into a Solo Run

Vault Breaker repurposes the Cryo Archive, Marathon’s existing endgame map, and reframes it as a roguelite gauntlet. Bungie’s official patch notes describe a progressively challenging series of vaults that get tougher with every run, whether a Runner tackles them alone, in a duo, or with the standard three-person crew.

There is no level gate. A brand-new Runner and a maxed-out veteran can both queue in. Solo players get a dedicated Solo Queue that pits them against the UESC, the AI security force that patrols the vaults instead of rival players. Duos and trios can bring their own crew or get matched through the usual system.

• Solo Queue – one Runner against AI-controlled UESC forces, no rival squads anywhere on the map.
• Vault Data – a new event currency earned on every run, spent on rewards or on upgrading a Sponsored Kit.
• Sponsored Kit progression – starts with one basic weapon and a handful of consumables, then branches into weapon quality, implants and cores, or survivability as players spend Vault Data.
• Vault Breaker Armory – a new tab inside the existing Armory where the free Sponsored Kit is equipped before a run.

The kit is deliberately weak at first. Bungie wants players grinding through runs to unlock the good stuff, not walking in already geared. That loop, run, earn currency, upgrade, run again, is standard roguelite structure borrowed wholesale from outside the extraction genre Marathon was built to represent.

Why Is Bungie Adding PvE to a PvP Shooter Now?

Bungie is treating Vault Breaker as a two-week data-gathering exercise rather than a finished feature, using it to test whether a fuller PvE mode can hold players ahead of Season 3’s planned launch on September 22. The mode runs only through August 4, and Bungie has been explicit that this is a controlled experiment, not a permanent addition yet.

That framing matters because Marathon’s entire pitch at launch was risk. Losing a run meant losing every piece of gear a Runner carried in. Vault Breaker strips that risk out entirely for anyone who wants it, and outside coverage of the patch has called it one of the most requested additions since the game shipped in March.

Bungie’s developer team previewed the changes five days early on social media, describing the update as covering balance changes, Vault Breaker details, and a few much-needed weapon adjustments ahead of the full patch notes landing the morning of July 21.

The Patch Reins In WSTR, D54, and Grenade Spam

Vault Breaker is the headline, but the balance pass underneath it reshapes how fights actually play out across every mode, not just the new one.

Extra Loadout-Limited items can still be picked up and extracted mid-run. The cap only applies to what a Runner brings in at the start, according to Bungie’s patch notes. Small fixes round out the rest: a container-clipping bug in Cryo Vault 02, a login loop that could strand players, and cleaner visuals on multi-select item tiles.

Players Left Almost as Fast as They Arrived

The context behind this patch is a population chart that has only pointed one direction since March. Marathon launched March 5, priced around $39.99 on Steam, PlayStation 5 and Xbox Series X/S, and it moved fast out of the gate before falling just as quickly.

• 88,337 concurrent players on Steam, Marathon’s all-time peak, hit within hours of its March 5 launch.
• 59% is how far that number had already fallen by early April, about a month after release.
• 6,000 concurrent players is roughly where Marathon sat on Steam in mid-July, per Windows Central, right before this patch.
• 167,867 is Destiny 2’s concurrent peak in June, when the game Bungie deprioritized beat Marathon’s entire lifetime high with a single farewell update.

Windows Central reported that Marathon wasn’t even inside the top 100 most-played games on Xbox as of mid-July, sitting behind Xbox 360 titles Gears of War 2 and Fable 3. On SteamDB’s live tracker, concurrent players jumped to 23,176 in the hours after Vault Breaker went live, a familiar shape. Marathon’s free Open Play Week in June produced a similar bump around the Night Marsh zone and a PvP-lite mode called Sponsored Survival, and that bump faded once the event ended.

The game’s reviews have held up better than its population. Steam reviews sat above 90% positive around launch, according to Sony’s own reporting, and SteamDB now lists Marathon at 84.39% positive across 45,737 reviews, still rated Very Positive even as the crowd thinned.

Three Rounds of Cuts in Under Three Years

Vault Breaker did not ship from a studio at full strength. Bungie has cut staff three times since 2023, and the most recent round landed one month before this patch.

Sony Interactive Entertainment CEO Hermen Hulst announced the June round personally, telling staff that Marathon “remains an important part of our portfolio” even as cuts landed inside its own team. Bungie has not published an official headcount for that round, but Forbes contributor Paul Tassi, who covers the studio closely, reported that more than 400 people sat in on the layoff call, suggesting roughly half of Bungie’s remaining staff was affected.

Sony Wrote Down $765 Million and Still Calls Marathon a Priority

Weeks before those layoffs, Sony’s FY25 earnings disclosed a $765 million impairment charge tied to Bungie’s falling value, split into a $204 million hit tied to Destiny 2 and a $565 million charge in the quarter Marathon launched and stumbled. That is more than a fifth of the $3.6 billion Sony paid to acquire the studio in 2022.

Sony’s public line at the time stayed upbeat. “Engagement metrics such as retention also remain at a high level,” the company said in its earnings commentary, framing planned content like this mid-season patch as the path to turning the game around.

Not every outside observer bought that framing.

That optimism seems unwarranted if you’ve been tracking the performance of the game, which has continually lost players since launch with no signs of anything resembling a turnaround, even as moves have been made to appeal to more casual players.

Paul Tassi wrote that assessment for Forbes back in May, months before the population kept sliding toward the roughly 6,000 concurrent players Windows Central found in mid-July.

What Season 3’s Full PvE Mode Has to Prove

Vault Breaker closes August 4. Whatever Bungie learns from it feeds directly into Season 3, which starts September 22 with a fuller PvE offering already promised if this test lands well. That gives the studio roughly seven weeks between one experiment ending and the next commitment beginning.

The math working against that plan is blunt. A shooter sold on PvP risk is now routing its clearest post-launch momentum through a mode that removes that risk, staffed by a team that lost close to half its people a month before the patch shipped. Season 3 will show whether that trade actually brings players back or just buys the game two more months of patch notes.

Frequently Asked Questions

Can You Play Vault Breaker Solo in Marathon?

Yes. Solo Queue puts one Runner against the UESC’s AI forces with no rival squads on the map. Dying in Vault Breaker only risks mode-specific loot and the Sponsored Kit, not the gear a Runner carries into standard extraction runs.

Is Marathon Free to Play?

No. Marathon launched as a paid title priced around $39.99 on Steam, PlayStation 5, and Xbox Series X/S. Bungie has run limited free trial windows, including June’s Open Play Week, to bring lapsed players back without making the game permanently free.

When Is Marathon Season 3?

Season 3 is set to begin September 22, 2026. Bungie has said a fuller PvE mode is planned for that season if Vault Breaker’s two-week test goes well, though pricing and whether Sponsored Kit progress carries forward have not been detailed.

Does Loot From Vault Breaker Carry Into Marathon’s Main Modes?

Mostly no. Regular loot picked up inside Vault Breaker stays inside the mode. Only the Vault Data currency and certain designated rewards can be spent on gear usable elsewhere in Marathon.

How Many People Are Playing Marathon Right Now?

SteamDB’s tracker showed concurrent players jump to 23,176 in the hours after the July 21 patch, up sharply from roughly 6,000 concurrent players in the weeks before it. Marathon’s all-time Steam peak remains 88,337, set on launch day in March.