What players should know
Open Realm of Stars is an independent, turn-based space strategy game by Reemax. Lead a spacefaring realm through exploration, planetary development, diplomacy, and tactical fleet battles. Design ships from researched components, assign leaders, and respond to anomalies, political tensions, and events that make each galaxy different. Military conquest is only one route to success: diplomatic, scientific, cultural, and other victory conditions encourage different empire-building plans. This is an actively evolving project, and saves may not be compatible with later versions. Download the official 0.29.0 archive, extract it, and run the included JAR with Java 11 or newer. Java is required; this listing opens the official release page rather than pretending the archive is a native Windows EXE. Code license: GPL-2.0. Media/package license: CC BY-SA 4.0, with individual asset credits in the project. Attribution and distribution: Open Realm of Stars is developed by Reemax (Tuomo Untinen). Code is GPL-2.0; the developer identifies the assets as CC BY-SA 4.0. Images are unmodified official project media. Follow repository credits for individual contributors. Independent catalog listing. NeonRoof is not affiliated with or endorsed by this project's developers. Downloads are provided by the project's official distribution source.
Key features
- Generated galaxies and multiple species
- Custom ship designs
- Diplomacy and leader management
- Turn-based fleet combat
- Multiple victory paths
Before you install
Minimum
Java 11 or newer; 4 GB RAM; display at least 1024 x 768; allow space for the current archive and extracted game.
Quick preview
Explore Open Realm of Stars
Open Realm of Stars FAQ
What is Open Realm of Stars?
Explore a generated galaxy, colonize planets, design starships, and negotiate your way to victory in an indie space 4X.
Is Open Realm of Stars free?
Yes. Open Realm of Stars is listed as a free game on NeonRoof.
Where does the Open Realm of Stars download come from?
NeonRoof sends players to the official Open Realm of Stars project or developer distribution source. NeonRoof does not claim to be the game's developer.
Which platforms support Open Realm of Stars?
Linux (Java 11+) / macOS / PC
Is Open Realm of Stars open source?
The code license is GPL-2.0. The media license is CC BY-SA 4.0, with individual asset credits in the project. Code and artwork can use different licenses, so check the linked project notices before redistributing or modifying the game.
Unofficial Open Realm of Stars shirts, mugs, hoodies, hats, mouse pads, and more
No game-branded merchandise is currently published. Generic recommended gear appears below when available.
Gear for playing Open Realm of Stars
Generic PC gaming accessories selected for NeonRoof players. These products are not official Open Realm of Stars merchandise or endorsements.

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