Barony! It just had a big update release yesterday, part of which was a UI overhaul that made it much more playable with a controller. Runs flawlessly on the Deck with compatability set to Proton mode; prior to the update I had issues running the default native Linux version (text and textures were garbled) but have not tried on the new patch.

It is a roguelike that feels more like actual Rogue or Nethack than anything I have played in a while and has great co-op support. I was having lots of fun learning the game before the update and am excited to spend more time with it, if the voxel-y graphics are not a turn off I definitely recommend it! Works well for shorter play sessions.