Marathon Season 3 & Upcoming Content: What Bungie Confirmed (2026)

Bungie dropped Update 1.1.5 on July 21, 2026 with a two-week PvE test called Vault Breaker, and most of the chatter since then has been about grenade caps and a nerfed pistol. The bigger news is buried a few lines into the patch notes: Vault Breaker is a stress test for the actual PvE mode landing in Season 3. Here’s what Bungie has actually confirmed for that next season, what’s still a guess, and why the two-week clock on Vault Breaker matters more than most players realize.

Bungie has confirmed Season 3 begins on September 22, 2026 and will bring the game’s first permanent PvE mode, built directly from feedback Bungie is collecting during Vault Breaker right now. Alongside that, the season revamps Perimeter — the starting map every new Runner learns on — with new areas and encounters, adds a new Runner shell, and drops fresh weapons and gear.

What Bungie hasn’t said is almost as important. There’s no confirmation on whether the full PvE mode ships on day one of Season 3 or arrives mid-season the way Vault Breaker did in Season 2, and the studio hasn’t detailed the new shell or named a single weapon. Treat anything beyond dates and the four confirmed pillars as a placeholder until Bungie’s next blog post.

Vault Breaker is Marathon‘s first experimental PvE mode, running solo, duo, or trio through a chain of increasingly difficult vaults inside the Cryo Archive, and it’s available to all players regardless of Runner Level, meaning that anyone can jump into Marathon’s first PvE experience from day one. Unlike a normal extraction run, equipment found during Vault Breaker cannot be brought out of the Cryo Archive — only the event currency and designated rewards leave with you.

What Disappears When the Event Ends

Tier 1 Vault Data drops from solved Vaults (must be exfilled) or from killing a UESC Commander, which pays out whether you exfil or not. Tier 2 only comes from consecutive Vaults solved and successfully exfilled in the same run. Cosmetic rewards tied to Vault Breaker’s Codex challenges are also time-limited — considering that Vault Breaker is a time-limited event, you’re unlikely to get these rewards any other way when it’s over, unless Bungie decides to reopen those challenges inside Season 3’s version of the mode.

What Actually Sticks Around

Gear purchased with Vault Data in the Vault Breaker Armory carries into standard Marathon activities, so that grind isn’t wasted once the event ends. Cradle Evolution, introduced in the same patch, is a permanent system rather than an event mechanic — progress you bank there survives past August 4. For a full breakdown of how Tier 1 and Tier 2 currency actually stack up, the Vault Data farming guide covers the exact routes worth prioritizing before the timer runs out.

Season 3 rides in on the back of Season 2 and, per Bungie’s own Key Dates post, players can expect a revamp of Perimeter, the first map anyone plays. As it stands, it’s a comparatively safe map, but that will likely change when Season 3 lands, with Bungie planning to add major new areas, encounters, and gameplay elements. Beyond the map, Season 3 brings with it a new Runner shell as well as new weapons and gear, and “lots of other content and surprises.”

The Loadout-Limited cap that shipped with 1.1.5 is sticking around as the new normal heading into Season 3, not a Vault Breaker-only rule. Six items are capped at two per infil combined, and a Crew Error blocks the run if a squad tries to stack more:

• Bubble Shield
• Chem Grenade
• EMP Grenade
• Flechette Grenade
• Frag Grenade
• Heat Grenade

Ganglion barters also picked up a hard stock limit of 3 per item (Hyphatic Gel excepted), some costs now fold in Rubber Salvage, and the reroll exploit players had been abusing to farm cheap rerolls is patched out.

Bungie’s own coverage of Vault Breaker frames it plainly as gathering data ahead of the full system, and that’s exactly the kind of phrasing that should make you cautious about assuming Season 3’s PvE mode will look identical to what’s live right now. A two-week test with unique Sponsored Kits and no gear extraction is a fundamentally different design space than a permanent mode sitting alongside standard extraction runs.

• Day one or mid-season? Coverage agrees the PvE mode is coming in Season 3, but not when inside the season it actually unlocks.
• Same Sponsored Kits? Whether the permanent mode keeps Vault Breaker’s kit system or replaces it with standard loadouts hasn’t been detailed.
• Do the missed cosmetics return? Codex rewards tied to this test window may or may not reopen once Season 3’s version ships.
• What’s in “other content and surprises”? Bungie’s own phrasing for the rest of the season is deliberately vague.

It’s tempting to treat the current test as a preview of exactly what Season 3 will feel like. That’s the wrong read. Vault Breaker strips out standard loot rules entirely — no gear survives exfil except Vault Data — which is a workable design for a two-week experiment but a hard sell as a permanent mode sitting next to Marathon‘s core extraction loop.

The mode also got noticeably friendlier for lone players almost immediately after launch: Update 1.1.5.1 added a dedicated Solo queue with increased critical damage against UESC and reduced UESC aggression and accuracy, and players who want the original difficulty can queue Trios with Crew Fill off. Vault Breaker has the raw idea, Season 3’s version has the room to actually balance it.

With the event closing fast, chasing every Vault Breaker reward isn’t realistic for everyone. Prioritizing based on where you already stand in the mode gets more done in the time that’s left than trying to do everything.

If You Haven’t Touched Vault Breaker Yet

Focus on Commander kills first. That Tier 1 Vault Data pays out whether you exfil or not, so it’s the safest way to bank currency fast without needing a clean consecutive-vault run. Don’t chase Tier 2 gear on your first few attempts — it converts to Tier 1 at a 5x rate anyway if you can’t hit the harder requirement in time.

If You’re Already Deep Into a Run

Push for consecutive Vaults and a clean exfil — that’s the only source of Tier 2 Vault Data, and Tier 2 armory items carry a hard limit of 1x stock per week. Check the Armory now rather than waiting until the last day, since a sold-out weekly slot doesn’t come back before the event ends.

If you’re still sitting on Vault Data or Vault Breaker challenges, spend it before August 4 — none of it survives into Season 2’s remainder or Season 3. If you’re mainly here for the next big content drop, the confirmed pillars (Perimeter revamp, new shell, new gear, permanent PvE) are worth planning around, but the exact shape of that PvE mode is still a blank Bungie hasn’t filled in.