I'm running Mint, which is Ubuntu-based. All I had to do was extract the game folder from the compressed download file (PC version), then run either the Eternum.exe or Eternum.sh from that directory.
o, i was trying to on my laptop. my laptop probably has issues because i upgraded and ive noticed my desktop wont even hold icons but on my desktop i have same version of ubuntu and i just did a fresh install with no issues. ill just try it on my desktop and see if it works. thank you