ValveSoftware / ValveSoftware/Proton
Company of Heroes 3 (1677280)
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.NET
Game compatibility - Unofficial
Regression
- Dominant language
- C++
- Stars
- 32.8k
- Forks
- 1.6k
- PR merge metrics
- PR metrics pending
Description
Compatibility Report
- Name of the game with compatibility issues: Company of Heroes 3
- Steam AppID of the game: 1677280
System Information
- GPU: Steam Deck
- Driver/LLVM version: 4.6 Mesa 22.2.0
- Kernel version: 5.13.0-valve36-1-neptune
- Link to full system information report as Gist:
- Proton version: 7.0-6
I confirm:
- that I haven't found an existing compatibility report for this game.
- that I have checked whether there are updates for my system available.
Symptoms
i got a desync error whenever i join a multiplayer match

Reproduction
- just play multiplayer in any mod and you will get disconnected right after (it may be instant or after several minutes)
Contributor guide
No contributing guide indexed for this repository
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reproducing multiplayer in Company of Heroes 3 on Steam Deck with Proton 7.0-6, then inspect the attached steam-1677280.log and the reported desync behavior. Done would require an identified compatibility cause and a verified fix that prevents disconnection in multiplayer matches.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- linux
- Domain
- operating-systems
- Issue type
- Bug
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Active
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100