There are versions (wrappers) for linux and mac (1). I am playing daily on a mac. Meet me in TrenchWars!

1: https://steamcommunity.com/app/352700/discussions/0/16960406...

P.S. the chat can be quite toxic though. It changed for the worse in the last four years.

Windows XP, to be precise. Here's the Lutris and Wine AppDB entries.

[1] https://lutris.net/games/subspace-continuum/

[2] https://appdb.winehq.org/objectManager.php?sClass=applicatio...

For a cross-platform multi player spacey game, lookup the venerable xpilot and it's many variants.