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Sidereal Dominion: Avalon

Screenshots

Sidereal Dominion: Avalon screenshot 1
Trailer 0.3 trailerWatch trailer on Steam ↗

Sidereal Dominion: Avalon

Spatha Games · Published by Spatha Games · Official site ↗

2 user reviews — 100% positive (2 reviews) · 12 achievements

Last updated 28 Sept 2026

Rebuild the remnants of humanity and conquer the Milky Way in this grand strategy game. Colonize systems and corner markets, or lead your fleets to victory in real-time battles. Reclaim Earth, or terraform new worlds.

Early AccessDJCTQ 6

£4.99

Lowest price we've ever recorded

View on Steam

Prices can lag the live Steam store — always confirm before buying.

Price history

4 Sept 2026Lowest: £4.99 · Highest: £4.9910 Oct 2026

Indie, Strategy, Early Access · 2024 · More under £5 games

Explore the vast expanse of space as you rebuild humanity's remnants and lead your fleets to victory or reclaim Earth in this early access indie strategy game from Spatha Games.

About this game

Sidereal Dominion: Avalon is an indie strategy game where you command an interstellar empire, controlling its expansion through the galaxy and directly controlling your fleets in real-time space battles.

Features

  • Play on a map of the Milky Way and directly command your fleets in real-time battles .

  • Play premade governments, or make your own custom colony by mixing traits and making a flag.

  • Play with three different victory conditions. Reclaim Earth, or terraform a new homeworld for humanity .

  • Interact with a simulated economy that automatically adjusts production of goods. Micromanage your population as much or as little as you want .

  • Build mines and monopolize resources to obtain bonuses.

  • Shift your government’s structure on a political chart, unlocking different mechanics to use.

  • The game always starts the same but adds procedural elements as time goes on.

System Requirements

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Minimum

Minimum:
  • OS *: Windows 7
  • Processor: Intel Core i3-9100
  • Memory: 2 GB RAM
  • Graphics: GeForce GTX 550 TI
  • Storage: 4 GB available space

Recommended

Recommended:
  • OS: Windows 10
  • Processor: Intel Core i5-10400F
  • Memory: 4 GB RAM
  • Graphics: GeForce GTX 760
  • Storage: 4 GB available space

Supported Languages

English*
*languages with full audio support

Latest news

  • AnnouncementsOfficial

    0.3.1 - Modifications, Commanders, Victory

    The mission system was entirely deleted and replaced with a unique victory system. The victory system has three different methods by which you can win the game before time runs out. This should make the game faster and less tedious You can now modify ships in the ship modification tab. You unlock ship modifications through technologies and randomly while playing the game. There are 12 ways to modify each of the basic light/medium/heavy ships, or 1728 in total. You now acquire Commanders who will lead fleets into battle. They give you access to special abilities during battles which boost your ship stats for a period. This will need to be made more interesting in the future Added lens flares to the battle skyboxes, added 4 new skyboxes Reduced the size of the game by 300MB. Increased the performance of some game logic Improved parts of the GUI. Improved the in-game tutorial Added an Achievements tab in the main menu Improved the title-placement algorithm Added a rotation option to the custom flag maker Fixed a problem with jagged edge antialiasing when zoomed out of the map Added an action to increase the number of building slots on a planet Pricing and Development: I’m going to take a break from development for ~2 months unless there’s a major bug since I have other things to do. In addition, I have decided to “flip” the pricing of the game for Early Access. Instead of having large discounts combined with a high base price, the base price will be low with little to no discounts during sales. I feel that this will make the game more consistently accessible. If version 1.0 is reached, the price will go back up. Next versions will probably be about making the politics and diplomacy more interesting {STEAM_CLAN_IMAGE}/45107526/567dff0ff93ebe40b8f2211838b7afac6c8d24f1.png {STEAM_CLAN_IMAGE}/45107526/ee8f9a3a9808ce7f62073f9599e42691b793dd3b.png
    Read full article on Community Announcements (acetesdev)
  • Patch NotesOfficial

    0.2.3 - Structures

    You can construct defenses and space city structures Changed the ship research tree so you can pick “paths” for ships at the start. This will need to be expanded upon a lot later It now shows the reason you can’t recruit ships. The planet viewer was simplified. Added 5 music tracks Improved map borders
    Read full article on Community Announcements (acetesdev)
  • Patch NotesOfficial

    0.2.1

    Version 0.2.1 Pirates will raid your territory in the early/mid game. Pirates have their own ship models, and can be paid off sometimes Map Titles: You can turn on and off titles over the map governments. The title-placing algorithm is inconsistent right now and will be changed later on Sending and expelling internal colonists from a planet is now a continuous process instead of a one-time action. A new action to speed up integration was added You can scale the UI in the Options menu AIs won’t spam the player asking for ententes. Simplified the ship technology menu and some descriptions
    Read full article on Community Announcements (acetesdev)
  • Patch NotesOfficial

    Hotfix

    -Fixed a tooltip bug that crashes the game -Changed to Unity 6. Windows 7 is no longer supported as a result
    Read full article on Community Announcements (acetesdev)
  • Patch NotesOfficial

    Version 0.2

    Changed name to "Sidereal Dominion: Avalon", added early/preview version of map creator, added manpower building chain, minor UI improvements
    Read full article on Community Announcements (acetesdev)

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