Crumbling World is a lowpoly action RPG with a unique feature: The world is constantly crumbling around around you.
Use portals to move around the map before you fall off the crumbling landscape and end up in the Underworld. Yes, you don't immediately die... instead you fight your way through the Underworld and hop in a portal back to the upperworld. Crazy huh?

The current beta has a Linux version

https://dumearts.itch.io/crumbling-world