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Watch trailer on Steam ↗Efemeris - DTDA Games
DTDA Games · Published by DTDA Games · Official site ↗
2 user reviews — 50% positive (2 reviews)
Last updated 27 Sept 2026
Conquer the Celestial Vault in ten turns. A turn-based board game for one player against the AI, or two players across PC and mobile. Place tiles, harvest spices, recruit captains and crew, and claim five planets before your rival does.
PEGI 7PvP
£4.59
Lowest price we've ever recorded
View on SteamPrices can lag the live Steam store — always confirm before buying.
£4.59
Price history
3 Sept 2026Lowest: £4.59 · Highest: £4.598 Oct 2026
Indie, Strategy · 2023 · More under £5 games
In Efemeris by DTDA Games, strategize your way through space conquest. Place tiles, recruit crew, and outmaneuver opponents in turn-based battles for planetary dominance.
About this game
A board game among the stars
Efemeris is a turn-based board game of exploration and conquest. Two fleets face each other across a star map that does not exist yet — you build it, one tile at a time, as you explore.Ten turns. Five planets to conquer. One winner.
Play at your own pace
- Solo — face an AI opponent that drafts its captains, plays its crew cards and races you to the fifth planet.
- Two players — duel a friend across PC, Android and iOS. One buys it on Steam, the other plays on a phone.
Three nations, three ways to win
Choose the British Royal Navy, the French Royal Navy or the Spanish Armada. Each fields its own captains and its own crew members — the Governor who negotiates a planet's price down, the Lady of the Night who fills your holds, the Gunner without whom no shot is ever fired.Pick two captains and five crew members before the first tile is laid. That choice shapes the whole game.
Every turn, four decisions
- Explore — place a tile and open a new stretch of the Celestial Vault. Where you open it matters as much as what it holds.
- Harvest — collect Piper Stellis and Vanilla Caelum from the trading posts your ships occupy.
- Manoeuvre — move your galleon and frigates, spend crew cards, ride the Stellar Winds.
- Build — buy frigates, raise fortresses, and pay the spices that turn a planet into yours.
Nothing is free
Your spice holds never exceed five. Firing on an enemy ship costs a Gunner. Your captain's ability only triggers if a Chief mate is there to relay the order — and if your galleon falls, your captain goes down with it.Lose every planet you hold and the game ends there.
Hand-drawn celestial charts
Engraved constellations, gilded compass roses and inked portraits: Efemeris is played on an old star atlas that slowly fills with light.System Requirements
Will my PC run this? →Minimum
Minimum:
- OS *: Windows 7
- Processor: Pentium IV 1,6 GHz / Athlon XP 1600+
- Memory: 1 GB RAM
- Graphics: Graphic card 32 Mo
- DirectX: Version 9.0
- Storage: 250 MB available space
- Sound Card: Sound card DirectX 9
Supported Languages
English*, French*
*languages with full audio support
*languages with full audio support
Latest news
AnnouncementsOfficial
The Spanish Armada joins the Celestial Vault
A third nation enters the gameUntil now the Celestial Vault was fought over by two fleets. A third one has just made landfall: the Spanish Armada, with its own captains, its own crew, and two abilities no other nation has. Three captains to choose from:Aníbal Pargo — his galleon brings back two extra spices from a trading post. Use his ability twice and the hold fills that much faster.Catalina de Guzmán — raises a fortress instantly, and for free, on any planet of her command.Sebastián de Avilés — sells a crew member on the spot for one Star Pepper and one Celestial Vanilla. The card goes back to the reserve and can be hired again later. And two crew members found nowhere else:The Crewmaster — one extra bonus token on your next collection.The Governor — deduct one spice of your choice from a planet's price. Enough to take a world you could not afford a moment ago. A new opponentThe solo AI has been rebuilt from the ground up. It now drafts its captain and its crew instead of taking whatever came first. It plays its crew cards, which means it finally uses its captain's ability. It weighs where to open the board rather than dropping tiles at random, picks its targets — a galleon before a frigate — and reads how close you are to your fifth planet before deciding where to sail. And it plays by your rules: firing costs it a Gunner card, exactly as it costs you one. Now playable in FrenchEfemeris is fully localised: menus, tutorials, captains, crew, everything. The game follows your system language on first launch, and you can switch at any time from the Settings panel. Full change listAdded the Spanish Armada: 3 playable captains and 5 crew membersAdded two new crew abilities, the Crewmaster and the GovernorRebuilt the solo AI: drafting, crew cards, captain abilities, tile scoring, target selectionThe AI must now spend a Gunner card to attack, like any playerAdded full French localisation, with a language selector in the Settings panelFixed the interface locking up after...Read full article on Community Announcements (contact)Patch NotesOfficial
Spanish Nation
What's new: - adding spanish nation - increasing IA performanceRead full article on Community Announcements (contact)
