Thank you for your interest in trying out Eternal Siege!
The final version of the game will have full Linux support. I was not able to upload a Linux build for the Steam Nextfest, however a lot of friends have mentioned that proton V9.0-4 works. If you are on Linux and are having issues launching the game, please try Proton V9.0-4.
I am also happy to take Linux feedback, and all other feedback as well!
I will not be posting the patch notes here as there are too many changes to list, but they are in a .txt file inside the game folder.
Thank you for your continued support!