protonscr

Blitzkrieg 3

protonopen appid 235380Game compatibility - Unofficial.NET
ValveSoftware/Proton#9573 · opened 2026-03-15 by krixkrax1 · updated 2026-06-24 · 6 comments · github · game page · search this game
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Kkrixkrax1 2026-03-15 github

Compatibility Report

  • Name of the game with compatibility issues: Blitzkrieg 3
  • Steam AppID of the game: 235380

System Information

==Complete system info (spoiler click) ==

Operating System: openSUSE Tumbleweed 20260313
KDE Plasma Version: 6.6.2
KDE Frameworks Version: 6.23.0
Qt Version: 6.10.2
Kernel Version: 6.19.6-2-default (64-bit)
Graphics Platform: Wayland
Processors: 4 × Intel® Core™ i5-6500 CPU @ 3.20GHz
Memory: 16 GiB of RAM (15.6 GiB usable)
Graphics Processor: NVIDIA GeForce GTX 1050 Ti
Manufacturer: MSI
Product Name: MS-7972
System Version: 2.0

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

the game is not launching (neither experimental nor hotfix nor older versions of proton like 8 or 5)
steam-235380.log

Reproduction

Install the game, leave everything as default (Proton Experimental, no launch params) - game will pop up as playing then immediately quits.

@kisak-valve

Kkrixkrax1 2026-03-15 github

Moving this from the previous ticket (#1259) in a separate comment section, for better isolation of my experiments so far:

It seems there's something with the Launcher.exe

I tried to manually run it via protontricks, and I got an error message:

Path cannot be found

(sorry I don't know how to set it to english, but it translates as: Path cannot be found --or something like that.)

Furthermore, I then manually launched a b3.exe (again with Protontricks) which is found under Client/b3.exe, it then starts but only until the loading screen, language is now Russian (its not respecting steam's english setting), and it's erroring out with xml not found and such at that loading screen I attached as screenshot below. I manually copied over those to my home folder where it was looking for, but then never progressed further, the loading screen was still stuck, just like that:

Image

Then I was like, maybe it's in the wrong starting location, since Z: is always bound to / by default, so I launched winecfg again from protontricks (from the prefix ofcourse), and bound my Z: to /home/username/.local/share/Steam/steamapps/common/Blitzkrieg3 in the hope that it's gonna find all the stuffs its looking for, then retried with Launcher.exe and b3.exe but to no avail. My wild guess is that there's something wrong with the pathing.

Kkisak-valve maintainer 2026-03-15 github

Hello @krixkrax1, these look like some lines of interest from your Proton log:

Unhandled Exception:
System.MissingMethodException: Method not found: bool System.AppDomainSetup.get_SandboxInterop()
  at BO.Cluster.HostedService.Initialize () [0x000c0] in <dadf097203b44c35b0a57486e460f53c>:0 
  at (wrapper remoting-invoke-with-check) BO.Cluster.HostedService.Initialize()
  at BO.Cluster.Host+<>c__DisplayClass42_0.<BO.Cluster.Topology.Services.IHost.CreateAndStartService>b__0 (System.Threading.Tasks.Task`1[TResult] task) [0x0006d] in <dadf097203b44c35b0a57486e460f53c>:0 
  at System.Threading.Tasks.ContinuationResultTaskFromResultTask`2[TAntecedentResult,TResult].InnerInvoke () [0x00024] in <60bb7eaf44204dc583390995e42e38f8>:0 
  at System.Threading.Tasks.Task.Execute () [0x00000] in <60bb7eaf44204dc583390995e42e38f8>:0 
  at BO.TaskUtils.BlockingAwait[T] (System.Threading.Tasks.Task`1[TResult] task) [0x00031] in <0ed0cf49c91a4b469cf76f4af5103119>:0 
  at BO.Cluster.ClusterHost.StartService (BO.Cluster.ServiceType type) [0x0002a] in <98c0214a99d8485d99c679fc2db73695>:0 
  at BO.Cluster.ClusterHost.Start (BO.Cluster.ServiceType[] services) [0x0004a] in <98c0214a99d8485d99c679fc2db73695>:0 
  at BO.Cluster.ClusterHost.StartAll () [0x00000] in <98c0214a99d8485d99c679fc2db73695>:0 
  at BO.Cluster.Program.Main (System.String[] args) [0x000b7] in <98c0214a99d8485d99c679fc2db73695>:0 
[ERROR] FATAL UNHANDLED EXCEPTION: System.MissingMethodException: Method not found: bool System.AppDomainSetup.get_SandboxInterop()
  at BO.Cluster.HostedService.Initialize () [0x000c0] in <dadf097203b44c35b0a57486e460f53c>:0 
  at (wrapper remoting-invoke-with-check) BO.Cluster.HostedService.Initialize()
  at BO.Cluster.Host+<>c__DisplayClass42_0.<BO.Cluster.Topology.Services.IHost.CreateAndStartService>b__0 (System.Threading.Tasks.Task`1[TResult] task) [0x0006d] in <dadf097203b44c35b0a57486e460f53c>:0 
  at System.Threading.Tasks.ContinuationResultTaskFromResultTask`2[TAntecedentResult,TResult].InnerInvoke () [0x00024] in <60bb7eaf44204dc583390995e42e38f8>:0 
  at System.Threading.Tasks.Task.Execute () [0x00000] in <60bb7eaf44204dc583390995e42e38f8>:0 
  at BO.TaskUtils.BlockingAwait[T] (System.Threading.Tasks.Task`1[TResult] task) [0x00031] in <0ed0cf49c91a4b469cf76f4af5103119>:0 
  at BO.Cluster.ClusterHost.StartService (BO.Cluster.ServiceType type) [0x0002a] in <98c0214a99d8485d99c679fc2db73695>:0 
  at BO.Cluster.ClusterHost.Start (BO.Cluster.ServiceType[] services) [0x0004a] in <98c0214a99d8485d99c679fc2db73695>:0 
  at BO.Cluster.ClusterHost.StartAll () [0x00000] in <98c0214a99d8485d99c679fc2db73695>:0
Kkrixkrax1 2026-03-15 github

Hello @krixkrax1, these look like some lines of interest from your Proton log:

Hi thanks for quick responding. What sould I try with this, or do you need any further logs? I'm here at your disposal :) Is there a specific version of Proton or a launch option you recommend to bypass this, or is this something that needs a patch in the game's code?

@kisak-valve

Kkrixkrax1 2026-03-22 github

Hi @kisak-valve Can I have an update of an ETA for the fix please? I bought the game but then I might refund it to Steam if this takes long as I can't play it currently :(

Kkrixkrax1 2026-04-09 github

Hello any news?

Kkrixkrax1 2026-06-24 github

hello any news @kisak-valve

Proton versions