Compatibility Report

1-) Proton log is missing.
2-) Why Proton 5.13-6?

1. Sorry, is this the one? steam-999020.log

2. I went with 5.13-6 since the latest report on ProtonDB recommended using it, and unlike the previous reports it didn't mention the FMVs not working.

I cannot launch the game. It's like if the install script was not launching. When I click "Play", it changes to "Cancel" and it says "launching" on the right, but the name of the game stays in white on the left with the the "- launching" added to it. And nothing else happens. I cannot get a log file, as if proton was not launching.
I have the exact same problem with the Mega Man X Collection, but not with Mega Man Collection. I've given more details in the corresponding issue.

Switching to Proton 7 solved the problem, as explained there: [#6859](https://github.com/ValveSoftware/Proton/issues/6859).
After that, I was able to switch back to Proton 8 and it worked.

I've found an issue with this title using Proton 9.0-4, 10.0-2 (RC) and Experimental (2025-07-25). If you launch this game and change the window mode to "fullscreen" (without changing the resolution firstly to match the desktop's), it hangs on a black screen and then an error popup is displayed (happens with DXVK and WineD3D)

Proton logs (10.0-2):

• steam-999020_wined3d.tar.gz
• steam-999020_dxvk.tar.gz

Main error lines:

359.053:0140:0144:err:system:NtUserChangeDisplaySettings Changing L"\\\\.\\DISPLAY1" display settings returned -2.
359.053:0140:0144:err:system:NtUserChangeDisplaySettings Changing L"\\\\.\\DISPLAY1" display settings returned -2.
err:   D3D9: EnterFullscreenMode: Failed to change display mode

Specs:

• OS: Arch
• Kernel: 6;12;29
• GPU: RX 6700 XT (Mesa 25.0.5)
• CPU: Ryzen 7 5700G (8c/16t)
• DE: Plasma 6.3.5 (X11)

Hi @kisak-valve . I had stopped with 9.0, but just tested with 8.0-5 and the issue doesn't happen.

@ranplayer I've been trying to repro on proton 9/10/exp with plasma wayland/xorg and it has worked fine every time on my end. Looking close into your log file I see that your resolution isn't 16:9, and I think your issue might stem from that rather than the resolution not being the same as your monitor.

In my case, the game lists only 16:9 resolution, but yours is set to 1920x1060 which is 96:53. What is your monitor's resolution? What resolutions does the game list for you? And what's the output of xrandr (run it in your terminal)?

@simifor , sorry for the really late response (some times I get lost with so many threads). Just to be more specific: the issue only happens for a clean installation (if you set the game to fullscreen without changing the resolution firstly). If you do the opposite, no issues (even if you retry the first scenario). I've just tried with Proton 10-3 (RC), Mesa 25.2.5 and kernel 6.12.53 and was able to reproduce the crash.

@ranplayer can't repro here. Wiped the prefix each try, the game starts as 1600x900 on my end while my monitor is 2k, switching to fullscreen before switching resolution first still had the game behave correctly. Tried on plasma xorg and wayland. I think the main factor here is likely the aspect ratio the game is trying to run as.