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AO: Containment Breach

Also known as AO: Containment Breach, acb, ao containment breach

AO: Containment Breach is a Procedurally Generated, Level Building, Semi-Auto-Battling, Rogue-lite, Horror hybrid. Fight and Contain AOs as you travel through the Terra AO facility. During "Dives" scavenge for Materials to Craft unique Weapons, and Upgrades.

Last update
10 Jun 2026
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BIOSPHERE UPDATE v568 - Patch Notes:

>>>New Additions<<< -New BIOSPHERE Sector has appeared! (As Custodians excessively use ANCs to solidify the reality of the AOI facility, a deeper sector has been bridged to). -5 New AOs have been reveled in the Biospher…

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Update history

Browse past updates and patch notes for this game.

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Gallery

In-game media

Achievements

Community progression

Top picks from 50 Steam achievements, sorted by player unlock rates.

  • ClassOBJ: Density EvolverHidden98.5%
  • Office SectorHidden60.8%
  • Hostile EncounterEliminate a Group of Hostiles.47.8%
  • AO Alpha ExperienceHidden44.9%
  • AO ContainedContain an AO.40.5%
  • In Need of RepairComplete a Facility Repair.27.5%