Marathon is set to add an experimental PvE roguelite mode called Vault Breaker as part of a mid-season update. According to Bungie’s latest announcement and accompanying details shared by outlets, Vault Breaker is scheduled to go live next week as a featured addition to the game’s existing seasonal roadmap. The mode is described as an “experimental” PvE offering and a step beyond previously available content in that category.

A key point across reports is the limited availability window. The mode is expected to be playable for only about two weeks when it launches, with Bungie positioning this as a short test period rather than a long-term release. After this initial run, the full rollout is expected to occur later, with one report stating that broader deployment should happen sometime in Season 3.

The coverage also references Bungie’s blog post and teaser materials, including a trailer, that show additional elements of what players can expect from Vault Breaker. Overall, sources align on the mode’s name, its experimental PvE roguelite framing, its imminent mid-season arrival, and its brief initial availability before a later, more complete release.