protonscr

Yargis - Space Melee

protonclosed appid 369040Game compatibility - Unofficial.NET.NET-XNA
ValveSoftware/Proton#9226 · opened 2025-11-16 by F1ReB4LL · updated 2026-04-20 · 3 comments · github · game page · search this game
FF1ReB4LL 2025-11-16 github

Compatibility Report

  • Name of the game with compatibility issues: Yargis - Space Melee
  • Steam AppID of the game: 369040

System Information

  • Steam Deck (LCD)
  • Video driver version: 4.6 Mesa 24.3.4 (git-8d0948917e)
  • Kernel version: 6.11.11
  • Proton version: 1762451175 experimental-10.0-20251106b

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.

Symptoms

A .NET + XNA 4.0 game, instantly crashes and opens a send report form. In the report details the error message is "EXCEPTION handling: System.NotImplementedException: The method or operation is not implemented."

Image

Image

steam-369040.log

Reproduction

Install and run the game.

Mmadewokherd 2025-11-19 github

Found by setting MONO_INLINELIMIT=0 that the unimplemented method is Microsoft.Xna.Framework.Graphics.GraphicsAdapter.get_MonitorHandle()

Mmadewokherd 2026-02-27 github

Should be fixed in Wine Mono 11.0.0, which is not yet shipped in any Proton release, but could be installed manually. I think the new Wine Mono is too risky to add until Proton 11.

EDIT: I also found that it needs FNA3D_FORCE_DRIVER=D3D11 %command% in launch options.

FF1ReB4LL 2026-04-20 github

Yep, seems to work fine under Proton 11 beta (even without chaging the launch options).

Launch lines