Linux Mint (XFCE). Proton 10.0-3 (Latest Official Steam Version). 1080p Windowed + AA 4x & 2K Shadows (probably lost a lot of frames because of this). I would recommend Windowed 720p with lowest settings.

Took a break around 44 seconds at 4:43:35 (Did not remove the 44 seconds from the submitted time - since I did not open a menu to show the timer).