I
The Deepest Prison
Tartarus lies as far beneath the underworld as the sky stands above the earth — ringed by a wall of bronze and the threefold night. Into it the elder powers were cast.
Greek myth · Strategy · Single-player
Hold the Balance of the Abyss
Beneath the underworld lies Tartarus — the abyss where the old world sealed its titans, cursed kings and forgotten queens. You are its eternal keeper.
Free
iPhone & iPad · iOS 16+
No account, no sign-in
Plays offline
Tartarus
82Serene
The abyss rests. Every ward holds and the bound are quiet.
Reserve100
Cycle6
Bound12
The abyss at a glance
Chambers
- 10Chambers
- 30Spirits
- 10Orders
- 9Rites
- 11Events
- 8Artifacts
The office of the keeper
Four things every keeper learns first
The keeper of Tartarus neither judges nor destroys. The task is older and stranger than either — to hold the balance of a place that must never be emptied, and never be broken.
II
Nothing Stands Alone
Every spirit you bind pulls on the ones around it. Some steady their neighbours; others unsettle them. Move a single prisoner and the balance shifts three chambers away.
III
Rites & the Turning Wheel
Strengthen the divine seals, spend the reserve of divine energy, and weather the mythic events that ripple through the realm. Every act you take has its price elsewhere.
IV
Hold the Balance
You are not here to destroy the bound, only to keep the equilibrium of a place that must never be emptied — and never be broken.
What you actually do
A prison that answers back
Tartarus Keeper is a slow, readable strategy game. No timers, no energy meters — just a system of readings that responds to everything you decide.
Ten Chambers
From the Titan Cells to the Gate of Tartarus itself, each chamber has its own resting stone, ward and malice — and its own neighbours that feel every tremor.
Thirty Bound Spirits
Cronus, Typhon, Medusa, Orpheus, Cassandra. Every archetype carries an origin, a power, a weakness and a danger rating from one to ten.
The Web of Influence
Spirits strengthen and weaken one another across the whole abyss. Echidna emboldens her monstrous children; Orpheus quiets even Cerberus at the gate.
Nine Rites of Containment
Channel Zeus' Lightning, invoke Athena's Blessing, close the rift portals. Each rite draws on a reserve of divine energy and leaves a mark of its own.
Eleven Mythic Events
A Titan Awakening, the Styx in flood, a seal torn open. The wheel turns whether you are ready or not, and each omen runs for several cycles.
The Archive
A mythology guide, eight artifacts of the old world, the full chronicle of your watch, statistics, ten honours to earn, and local snapshots you can restore.
Six readings, per chamber and realm-wide
StabilityHow firmly the chamber holds
Spirit DensityHow crowded with the bound
Divine SealThe strength of the divine ward
Curse LevelThe weight of old malice
PressureForce building against the walls
Energy BalanceThe flow of divine energy
The map of the abyss
Ten chambers, each with its own temper
Tap any chamber to read it, attend to it, and watch the consequence travel outward along the paths it shares with its neighbours.
Ten orders of the bound
Titans
Legendary Monsters
Mythical Guardians
Fallen Heroes
Restless Warriors
Ancient Kings
Oracles
Cursed Priests
Shades
Forgotten Queens
Where the vigil goes next
Roadmap
The abyss is not finished. Here is the order of the work — what has shipped, what is being built, and what is still being weighed.
The First Vigil
v1.0 ShippedThe full keeper's loop: ten chambers, thirty archetypes across ten orders, nine rites of containment, eleven mythic events, and an archive to read it all back.
- Realm map & six readings
- Bind & move spirits
- Web of influence
- Mythology guide
- Eight artifacts
- Ten honours
- Local snapshots
Deeper Cells
v1.1 In developmentMore of the abyss to fill, and a clearer answer to the question every keeper asks — why did that reading move?
- New archetypes from the outer myths
- Per-chamber history
- “Why it changed” breakdown
- Richer spirit portraits
The Turning Wheel
v1.2 NextEvents that build instead of simply landing — omens that warn before they strike, and rites that can be combined into a single greater working.
- Chained events
- Omens & forewarning
- Combined rites
- Difficulty of the watch
The Chronicle
v1.3 PlannedA watch worth remembering. Deeper statistics, an exportable chronicle of every rite and omen, and snapshots that follow you between devices.
- Expanded statistics
- Exportable chronicle
- Snapshot sync
- More honours
The Wider Realm
Beyond ExploringIdeas still being weighed — nothing promised, everything considered.
- Home-screen widget
- Localisation
- Alternate app icons
- Sound & ambience
This is the order of the work, not a schedule. Items may move, merge or be dropped if they don't serve the balance.
Privacy
Your realm stays on your device
Tartarus Keeper is a single-player game that runs on its own, without asking anything of you beyond your attention.
No account, no sign-in
We do not ask for a name, an email, or an account of any kind.
Saved where you play
Bound spirits, ritual records, event history, achievements, snapshots and settings are written only to the app's private storage on your device.
Clear it whenever you like
“Dissolve the Realm” in Settings resets the game, and deleting the app removes its private storage entirely.
Written for a general audience
The game is not directed at children under 13, and collects no information from anyone — children included.
Send word to the keeper
Questions, omens and bug reports
Found a seal that behaves strangely, or want to argue about which myth deserves a cell? Write in — every message is read by the person who builds the game.
The vigil is waiting
Ten chambers. Thirty bound spirits. One balance that must never be emptied, and never be broken.
Download on the App Store