Betrayer is a first person exploration action game based in 1604 in the to-be-America's. You sailed from England to a new world, but found something has gone horribly wrong. The Spanish soldiers are not what they seem... the land is corrupted, but you can enter the "upside-down" realm and defeat skeletons to purge it. Explore the land, discover its mysteries and learn what really happened.
Back in 2013 I posted a Betrayer guide in PlayOnLinux using Wine to play it, but there were some graphical bugs. Today Proton handles Betrayer without any issues... well there were some black rocks, but that was about it. Performance was awesome, even during the trees and vegetation blowing around in the wind.
Mint 19.3 64-bit
GeForce GTX 1060