

Works well with Proton GE. Steam imported my old Saves from the cloud. Just the first start took a while.

Stuttering makes it unplayable. maybe a powerful graphics card can improve it a bit on low settings
Runs with stutters on low settings. It almost freezes on high settings

While the game technically did run, the stock performance is unusable. I tested with minimum graphics and no proton tweaks.
Menu seems to be missing textures, from brief gameplay seemed to only be on menus and game would otherwise be playable.
Ran consistently at around 8FPS, did not complete tutorial due to poor performance.

Starts fine with GE 6 and Proton 6 but hangs on loading the game
The game starts fine, using GE 6.01 or vanilla Proton 6, albeit it takes a bit to start. The main menu shows fine as well but after clicking on new game, the loading screen appears. You can see the circle moving, that indicated, it is indeed loading, and you can press like F1 to get the help up.
However, after like 5 minutes of loading, the circle stops moving, keyboard commands like F1 for help don't work anymore and if you have anything like the F1 menu open, you can't close it. You also cannot call the Steam overlay with CTRL SHIFT and end the game from there. You can however ALT Tab out easily and just click on Stop in Steam to stop the game. No crash here and no reboot or terminal, etc. is needed. There have been 2 updates since I got to play test and none of them fixed the issue. I did not tinker with it, aside from trying different Proton versions. I also tried changing from full screen to window and vice versa without changing anything.