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Endless Sky

Explore other star systems. Earn money by trading, carrying passengers, or completing missions. Use your earnings to buy a better ship or to upgrade the weapons and engines on your current one. Blow up pirates. Take sides in a civil war. Or leave human space behind and hope to find some friendly aliens whose culture is more civilized than your own...

Endless Sky is a sandbox-style space exploration game similar to Elite, Escape Velocity, or Star Control. You start out as the captain of a tiny spaceship and can choose what to do from there. The game includes a major plot line and many minor missions, but you can choose whether you want to play through the plot or strike out on your own as a merchant or bounty hunter or explorer.

See the player's manual for more information, or the home page for screenshots and the occasional blog post.

Installing the game

Official releases of Endless Sky are available as direct downloads from GitHub, on Steam, and on Flathub. Other package managers may also include the game, though the specific version provided may not be up-to-date.

System Requirements

Endless Sky has very minimal system requirements, meaning most systems should be able to run the game. The most restrictive requirement is likely that your device must support at least OpenGL 3.

Minimum Recommended
RAM 500 MB 1 GB
Graphics OpenGL 3.0 OpenGL 3.3
Storage Free 300 MB 1 GB

Building from source

Most development is done on Linux and Windows, using CMake (build instructions) to compile the project. For those wishing to use an IDE, project files are provided for Code::Blocks to simplify the project setup, and other IDEs are supported through their respective CMake integration. SCons was the primary build tool up until 0.9.16, and some files and information continue to be available for it. For full installation instructions, consult the Build Instructions readme.


As a free and open source game, Endless Sky is the product of many people's work. Contributions of artwork, storylines, and other writing are most in-demand, though there is a loosely defined roadmap. Those who wish to contribute are encouraged to review the wiki, and to post in the community-run Discord beforehand. Those who prefer to use Steam can use its discussion rooms as well, or GitHub's discussion zone.

Endless Sky's main discussion and development area was once Google Groups, but due to factors outside our control, it is now inaccessible to new users, and should not be used anymore.


Endless Sky is a free, open source game. The source code is available under the GPL v3 license, and all the artwork is either public domain or released under a variety of Creative Commons (and similarly permissive) licenses. (To determine the copyright status of any of the artwork, consult the copyright file.)