Metallic Child demo is a 3rd person melee action game where you play as a human controlling a mysterious space station battle robot: Rona
At first glance she appears to be an innocent child-like robot, but beneath the skin she packs-a-punch!
Use several skills and melee weapons to destroy enemy bots then combo them together and take out challenging bosses.
The demo on steam is basically an introduction and tutorial to the game. Proton handles it just fine and I was able to play through the entire demo. Once you learn the basics, this is a fast moving action game with a lot of variety and upgrades.
Mint 20.1 64-bit
GeForce GTX 1060