protonscr

Horse Magnifier: The Full Horse

protonopen appid 4585340Game compatibility - Unofficial
ValveSoftware/Proton#10080 · opened 2026-08-19 by EnnuiL · updated 2026-08-20 · 4 comments · github · game page · search this game
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EEnnuiL 2026-08-19 github

Compatibility Report

  • Name of the game with compatibility issues: Horse Magnifier: The Full Horse
  • Steam AppID of the game: 4585340

System Information

  • GPU: Radeon RX 7600
  • Video driver version: Mesa 26.1.7
  • Kernel version: 7.1.8
  • Link to full system information report as Gist: The gist
  • Proton version: Proton Experimental (bleeding-edge)

I confirm:

  • [x] that I haven't found an existing compatibility report for this game.
  • [x] that I have checked whether there are updates for my system available.

steam-4585340.log

Symptoms

The game immediately crashes after starting it.

Reproduction

  1. Launch the game
  2. Observe the crash happen
EEnnuiL 2026-08-19 github

On ProtonDB, it has been reported that switching to Proton 5.13-6 fixes the crash issue, and I can confirm. I can also confirm that Proton 6.3-8 has the game crash issue as well.

EEnnuiL 2026-08-19 github

I decided to run this game through a terminal (and using this system's Wine) and I got this

0024:fixme:dwmapi:DwmSetWindowAttribute (0000000000010076, 21, 000000000091E050, 4) stub
0024:fixme:combase:RoGetActivationFactory (L"Windows.Foundation.Metadata.ApiInformation", {997439fe-f681-4a11-b416-c13a47e8ba36}, 000000000091EF88): semi-stub
0024:err:combase:RoGetActivationFactory Failed to load module L"C:\\windows\\system32\\wintypes.dll"
0024:fixme:combase:RoOriginateLanguageException 0x8007007e, L"", 0000000000000000: stub
terminate called after throwing an instance of 'winrt::hresult_error'

It appears that this game is affected by https://github.com/godotengine/godot/issues/121084, and I can confirm that this game is on Godot 4.7.1 using a reverse-engineering tool. However, I'm not sure whether updating the engine would fix it since the fixing PR (https://github.com/godotengine/godot/pull/121361) just says it might fix it

EDIT: Using %command% --rendering-driver vulkan as the launch flag fixes the game

HHansKristian-Work 2026-08-20 github

Fixed on vkd3d-proton master. Guess we can horse around in d3d12 now too :frog:

EEnnuiL 2026-08-20 github

Fixed on vkd3d-proton master. Guess we can horse around in d3d12 now too 🐸

Can confirm it works now on Proton Experimental bleeding-edge!

Screenshot of Horse Magnifier working on Proton Experimental as-is

Proton versions

Launch lines

DLLs

Error codes