Dungeon Fighter Online (495910)

Compatibility Report

• Name of the game with compatibility issues: Dungeon Fighter Online
• Steam AppID of the game: 495910

System Information

• GPU: Radeon 6600XT
• Driver/LLVM version: 21.3.1
• Kernel version: 5.15.6
• Link to full system information report as Gist: https://gist.github.com/wizardlink/0f9e7f5fb074481a65cc0ce7680451af
• Proton version: Proton Experimental (currently 6.3-8 at the time of writing this report)

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.

steam-495910.log

Symptoms

Upon opening the game it complains that it doesn't has enough space, as seen here:

From what I have read, even after fixing the issue you still cannot press "Play" in the launcher as it's greyed out; I confirmed this by installing the game externally.

I must also add that the game supposedly (mixed messages across forums) has an anti-cheat, so it might not even be possible to be ran.

Reproduction

1. Enable Steam Play;
2. Install Dungeon Fighter Online;
3. Open it.

Start with steam-495910.log and the Dungeon Fighter Online compatibility report, then reproduce the launch steps using Proton Experimental 6.3-8. Check the reported insufficient-space message and disabled Play button, while determining whether anti-cheat prevents the game from running. Done would require a confirmed cause and a verified compatibility outcome.