Games similar to Open Realm of Stars include FreeOrion, which is free and open source. Other options are Open Star Ruler, Remnants of the Precursors and Warpfire.io. In total there are four Action Games like Open Realm of Stars for Windows, Linux, Mac, the web and Android.
FreeOrion is a turn-based space empire and galactic conquest (4X) computer game being designed and built by the FreeOrion project. FreeOrion is inspired by the tradition of the Master of Orion games, but is not a clone or remake of that series or any other game.
A continuation of the open source release of star ruler 2 (a massive-scale 4X/RTS set in space) . Explore dozens, hundreds, or even thousands of systems in a galaxy (or galaxies) of your choosing, expand across their planets, exploit the resources you find, and ultimately...
Remnants of the Precursors is a open source modernization of the 4x strategy game Master of Orion.
Browser-based space MMO recreating classic gameplay, featuring real-time multiplayer battles, space exploration with allies, ship upgrades, PvP combat, missions, loot, top-down design, fleet tactics, and free play on any device without installation or downloads.
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