Limited Event — July 21 to August 4

Vault Breaker

UPDATE 1.1.5 · LIVE JULY 21, 2026 · TIERLISTHQ

Vault Breaker is Marathon's first PvE-only mode — a two-week experiment that removes rival squads entirely. You run progressively tougher Vaults inside Cryo Archive against UESC forces, solo or with a crew, and the only thing hunting you is the AI. It arrived with Update 1.1.5 on July 21, 2026 and leaves on August 4, 2026. If you've been curious about Marathon without the PvP pressure, this fortnight is the door Bungie built for you.

The Essentials

DATESJuly 21 – August 4, 2026 — two weeks, then it's gone. A permanent PvE offering is planned for Season 3 (September 22).
SQUAD SIZESolo, Duo, or Trio — matchmade or premade.
REQUIREMENTSNone. No Runner Level gate. Any account can queue from day one.
LOADOUTA free Sponsored Kit replaces your own gear — you risk nothing you own.
MAPCryo Archive, restructured as a roguelite: each Vault is harder than the last.

How Vault Data Works

Vault Data is the event currency and the main thing you carry out. It comes in two tiers, earned differently — and the difference matters for how you should play.

Tier 1 Vault Data — two sources
Solving Vaults (you must exfil to keep it) and killing a UESC Commander — which is credited after the run whether or not you exfil. That Commander rule is the detail most coverage misses: it's the one way to leave a failed run with something. If a run is going sideways, hunting the Commander before you go down is strictly better than a desperate exfil sprint.
Tier 2 Vault Data — one source only
Solving consecutive Vaults in a single run, then exfilling. No shortcut, no consolation route. Tier 2 is the greed currency — every additional Vault you attempt risks the streak, and only the exfil banks it. This is where the roguelite tension lives.

Nothing else leaves. Items and gear found during a run do not exfil with you — only Vault Data and designated event rewards. Don't waste run time looting for the main game; it stays behind.

Spending It: Kit Upgrades and the Armory

Vault Data has two sinks. You can upgrade the Sponsored Kit itself, making deeper Vault runs more survivable — or spend it in the new Vault Breaker Armory (under the Event section of the Armory tab), which sells gear usable in Vault Breaker and in Marathon's other modes. That second part is the bridge: the event grind can produce equipment your main-mode Runner keeps after August 4.

Which sink first?

Early days: kit upgrades, because they compound — a stronger kit means deeper runs, and deeper runs mean consecutive-Vault streaks, which is the only Tier 2 source. Pivot to Armory purchases in the event's back half once your runs are stable. If you only plan a handful of sessions, skip deep kit investment and buy the cross-mode gear directly.

Why This Event Exists

Bungie has confirmed a full PvE mode for Season 3 on September 22, 2026 — alongside a new Runner Shell, a Perimeter rework, and new enemies. Vault Breaker is the stress test: two weeks of data on whether the AI encounters and the infrastructure hold up without human opponents. Play it as a preview of Marathon's biggest structural bet, not just an event.

Is It Worth Playing?

If you already main Marathon: yes for the Armory gear, and the Tier 2 streak chase is genuinely tense. If you bounced off Marathon because of third-parties and PvP anxiety: this is the best two weeks the game has ever offered you — free kit, no level gate, no other players, and a clean exit on August 4 if it doesn't stick. The mode's biggest limitation is honest to state: it's experimental, it's one map, and the run variety will be fully explored well before the window closes.

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