ValveSoftware / ValveSoftware/Proton
Twenty One (938520)
Open
Nobody has claimed this yet.
.NET
Game compatibility - Unofficial
- 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: Twenty One
- Steam AppID of the game: 938520
System Information
- GPU: RX 5700XT 8GB
- Driver/LLVM version: Mesa 22.1.2
- Kernel version: 5.18.7 (Zen Kernel)
- Link to full system information report as Gist: https://gist.github.com/sonic2kk/2963fa1274604ea51a2817392b93c596
- Proton version: 7.0-3
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
Launching the game shows what seems to be a .NET related error:

Reproduction
Launching the game with Proton is all that seems to be needed to reproduce the issue.
Proton Log: steam-938520.log
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 the launch failure with Proton 7.0-3, then review steam-938520.log alongside the reported .NET error and system information. Done means Twenty One launches successfully under Proton without the reported error.
Written by the indexing model from the issue text.
Assessment
- Domain
- desktop
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100