Facility tier · Day counter · Resource stocks

Vault 13

Lead twelve souls through a sealed underground shelter when every day drains water, food, and power.

Survival loop

Three beats repeat every run: read the bunker, commit to upgrades, then live with the fallout.

  1. 1

    Command the day cycle

    Advance survival days from the command center while stock levels, facility tier, and stability decide whether the vault holds together.

  2. 2

    Upgrade the facility deck

    Repair damaged wings, push room levels higher, and keep hydro, generator, and medbay production online when morale slips.

  3. 3

    Council, crises, chronicle

    Manage residents, resolve conflicts, choose under pressure when crises hit, and read how each decision echoes in the chronicle timeline.