Our latest release, Update 32.3, will be our last with a native Linux version of Universe Sandbox. Future Linux versions of Universe Sandbox on Steam will be powered by Valve’s Proton, software built into Steam that allows Windows games to run on Linux.

If you are a Steam Linux player, no action is required to continue playing Universe Sandbox. This change should be seamless.

We know this may be disappointing, but after internal testing and user feedback, we have found that playing Universe Sandbox through Proton on Linux machines provides a better overall experience. Valve has put a tremendous amount of energy into developing Proton, which has made this decision much easier. As a small indie team, the upkeep of a Linux version was disproportionately high compared to the size of the Linux player base (just over 0.5% of all players).

Due to the limitations of the Steam platform, we can no longer provide access to older native Linux versions. If you are a Steam player who needs access to the last Linux native version (Update 32.3), please contact us.

If you are a GOG or Itch player, older releases will remain available in their respective download sections. We recommend GOG and Itch players on Linux use either Heroic Games Launcher or Lutris for future versions.