Marathon Bungie Launches “Vault Breaker” Experimental PvE Mode

Marathon Bungie released the Vault Breaker player-versus-environment (PvE) experimental mode, allowing solo players, duos or trios to tackle the Cryo map’s vaults. The mode replaces opposing teams with AI challenges and culminates in a fight against the Compiler, the same final boss from the standard Cryo extraction mode. Players begin with a dedicated kit, loot weapons and gear during the run, and extract only a currency that can upgrade Vault Breaker kits or purchase rotating store items usable across all game modes.

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According to Paul Tassi, the mode arrives as Marathon’s first substantive PvE offering, intended to test whether reducing the high-intensity barrier of the core extraction experience can attract new or less-intense players. Prior attempts to grow the player base—such as making the game temporarily free—did not yield lasting increases, leading developers to view PvE as a “last card” in their strategy. Tassi emphasizes that Vault Breaker is an experimental, two-week trial rather than a permanent addition, and that a more comprehensive PvE experience is slated for season 3.

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• Group Size: 1-3 players per run.

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• Map: Cryo, utilizing existing puzzle mechanics.

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• Progression: Looted gear cannot be extracted; only a currency is extracted for kit upgrades or store purchases.

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• Duration: Two-week trial window, after which the mode may be unavailable.

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• Integration: Players still access Vendor and Cradle upgrades, and the mode has its own separate skill tree.

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Tassi notes that because the mode is still early in development, it lacks the depth of a fully fleshed-out PvE system. Access requires ownership of the base game, though a future free weekend could broaden testing for skeptics.

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Marathon Bungie has announced a “real” PvE mode for season 3, promising a larger, freely accessible experience. The experimental Vault Breaker trial serves as a proof-of-concept; its reception will likely influence how the upcoming mode is shaped and whether PvE can meaningfully lower entry barriers for Marathon’s community.

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