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Life & fun · alternatives · 2026

24 alternatives to RTS with known stars and exoplanets can now be played in the browser

Hi HN, I'm a solo dev working on a space RTS game set in the Milky Way galaxy, containing currently known stars and exoplanets with their real characteristics, the remaining stars are procedurally generated. In the online mode, all players are in the same universe, and the world is persistent. You compete with other players to take back the Solar System and end your exile. Players can always retreat to the periphery to regain strength and rebuild their fleets as needed. It also includes an procedural spaceship generator that allows creating your own spaceship designs. Spaceships visuals…

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.

  1. 1IM

    I've posted this game here before, hopefully a repost is fine as the game has changed quite a bit (improved AI, improved mapeditor, much quicker gameplay, etc). Game is based on JavaScript/Canvas and WebSockets. On the browser side the map is pre-rendered (as a background image), just the mobile units/buildings and animations are dynamically rendered. The lobby server is made in node.js, but the game server is C++ for performance reasons (mainly the pathfinding). I found the C++ WebSocket libraries out there to be too difficult to use so I made my own based on the rfc. Overall I…

    2022 · battle-of-flags.com · its alternatives →

  2. 2

    A free old-school RTS... on Mars

    2015 · newgrounds.com · its alternatives →

  3. 3

    The open world (galaxy?) version of a really great iOS game!

    2015 · store.steampowered.com · its alternatives →

  4. 4

    An HTML5 version of the classic RTS

    2015 · github.com · its alternatives →

  5. 5
    AstroGrid▲113

    Explore the entire universe in your browser, in real 3D

    Apr 2026 · velonspace.com · its alternatives →

  6. 6

    Engage in 3D Tactical Space Battles in this Sci-Fi RTS

    2015 · its alternatives →

  7. 7

    Go racing through intergalactic lanes

    2016 · play.google.com · its alternatives →

  8. 8
    Tharsis▲66

    A turn-based space strategy game.

    2016 · store.steampowered.com · its alternatives →

  9. 9

    I built this with Claude cause I always wanted to tinker with a simulation economoy and I love space themes. A space-economy sim where nothing is scripted. A few hundred autonomous ships each run their own planner. Some chase the best trade route, take a delivery contract, refuel, retrofit at a shipyard, or dock so the crew can rest before morale tanks. Markets price everything off supply with shortage-urgency multipliers, factions tax and subsidize, populations migrate when they're unhappy, and stations that go broke get abandoned and rot. It started as an Elixir/Phoenix prototype, but…

    Jul 2026 · github.com · its alternatives →

  10. 10

    Take control of your own starship in a cutthroat galaxy

    2015 · store.steampowered.com · its alternatives →

  11. 11
    Element▲78

    A space RTS for people who don't have time for a normal RTS

    2016 · store.steampowered.com · its alternatives →

  12. 12MR

    We have launched our startup: MMO strategy game that can be played in your browser. Not very unique from first sound, but the fun hides in the gameplay which tries to blend RTS and web strategy genres. Feedback on the site design and game impressions are very welcome! Some of game features include: * Powerful trading system that allows people to exchange in-game currency (creds) for game resources. * Real-time real-world based movement system that allows players to interact while travelling, making our game akin to classic RTS genre. This also allows interesting gameplay possibilities like…

    2012 · nebula44.com · its alternatives →

  13. 13

    Find another habitable planet and rebuild your nation

    2015 · apps.apple.com · its alternatives →

  14. 14

    Simple and fun 8-bit timing based starship simulator.

    2015 · starcommandgame.com · its alternatives →

  15. 15

    A side scrolling combat racing game set in outer space

    2016 · intergalacticroadwarriors.com · its alternatives →

  16. 16

    A Sci-Fi tabletop-styled RPG

    2015 · galactickeep.com · its alternatives →

  17. 17

    Agar.io goes interstellar!

    2015 · vanar.io · its alternatives →

  18. 18

    I didn't realize Universe Sandbox ran on MacOS, and I was in the mood to play around a bit. Some functions it's got: - Random system generation - Sonification is super fun too - Habitability Simulation (Just for fun, don't cite this please) - Replacing, spawning, deleting objects I've had tons of fun building this, so I hope someone else can share the joy. It's free and runs in the browser. I'd love to hear any feedback. I think this is at a state where I might leave it as it is, but if people are interested in other features, maybe I'll keep working on it. I've kept saying I'll stop working…

    Dec 2025 · luna.watermelonson.com · its alternatives →

  19. 19

    The best sci-fi real-time strategy video game of all time

    2014 · starcraft.blizzard.com · its alternatives →

  20. 20

    Explore the worlds and systems of Star Wars.

    2015 · starwarsgalaxy.co · its alternatives →

  21. 21

    8Bit Space Sim Strategy MMO RPG

    2016 · apps.apple.com · its alternatives →

  22. 22

    Real Time Strategy. Contribute to emnh/rts development by creating an account on GitHub.

    2015 · github.com · its alternatives →

  23. 23

    An innovative strategy game set in space

    2016 · apps.apple.com · its alternatives →

  24. 24TE

    http://www.terraexgame.com Terra Ex will be a 4x ("explore, expand, exploit, and exterminate") multiplayer online browser based game. Our Kickstarter will begin Oct. 16th (link to KS preview is on our site). We are making this game, in part, to fund STEM education. Details are on our site. About the game (from the site): "Our story begins eons from now, when Earth collides with Mars. Humanity must face an uncertain future: we must forge new civilizations in the far corners of space. Your ships are small at first, but opportunity is endless. Will you become a merchant society or…

    2013 · its alternatives →

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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →