PROTON_USE_WINED3D=1 %command%
Black screen during Boss fight
Before you play the game, USE the Command line and save yourself from the headache, The game worked perfect from the start to finish compared to Obscure 1, did not have any gameplay broken but when i reached the boss fights it turned the whole screen black, only HUD showing which it was annoying to figure out the fix. i had to use "PROTON_USE_WINED3D=1 %command%" to fix the black screen problem. if you don't do that you get Softlocked at the end of the game, really fun... PC port sucks imo, i would recommend playing both games with Emulator so you don't have to suffer.
PROTON_USE_WINED3D=1 %command%
when you start the game you have to set the controller from the options and the game will seem perfect, but in reality during three fights (two against kenny and one against a spider monster) the screen will go black seeing only icons such as health and ammo, here's how to fix it: https://steamcommunity.com/app/3260/discussions/0/3133918821796537455/
No widescreen option
Use proton experimental to avoid the cutscenes lagging. To make the layout gamepad works is necessary to choose Xbox 360 Controller in-game options.
It works!
Works out of the box without any additional problems that don't exist on Windows. Also tested switching between desktop and game, and that also Nintendo Switch Pro controller works. The game only supports 4:3, except for cut-scenes that are widescreen. Mouse sensitivity is too high (but can be adjusted), mouse pointer is not hidden (workarounds exist) and video cut-scenes may have a scaling artifact depending on your monitors resolution. Rating platinum as the game works the same as on Windows, however the PC port to begin with is not flawless.
It works out of the box, with perfect frame-rate. The only bug I have found is that scaling does not seem to work very well, ie: 1920x1080 leaves 1/4 of the screen empty (apart from the expected 5:4 aspect-ratio)