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A new patch has been rolled out for ELDEN RING, and it's supposed to fix the inappropriate activity detected message from their anti-cheat with a bit of manual effort. Here's what to do. This issue affected Linux desktop, Steam Deck and it seems people on Windows PCs as well.

From their patch notes for version 1.12.3 it notes:

  • In the PC Version, the message "Inappropriate activity detected" may appear without cheating.

To fix this issue, please verify the integrity of the game's files before restarting the game.

  • In the PC version, unstable framerate may be caused by third party applications that control mouse behavior. Deactivating these third party applications may improve performance.

For once, it wasn't a Linux system specific issue.

To note, I do not have the DLC yet. And it seems FromSoftware haven't been doing thorough testing for people who do not have the DLC. If you do have the DLC, verifying the files might be enough to fix it as they suggest.

What if you don't have the DLC? Well, thanks to an answer on ProtonDB, you can fix it yourself. As always, do my fix suggestions at your own risk.

All you have to do is open up the installed folder, go into the "Game" folder and create an empty "DLC.bdt" file.

So in Steam (Desktop mode for Steam Deck) -> Right click on ELDEN RING -> properties -> Installed files -> Browse. Then go into the Game folder. Two ways to do it (tested using KDE Plasma):

  • Right click -> create new -> text file -> name it in the text box "DLC.bdt" (remove the .txt).
  • OR Right click in an empty space -> select Open Terminal Here and type "touch DLC.bdt".

And you're done. It will now work.

Article taken from GamingOnLinux.com.
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I am the owner of GamingOnLinux. After discovering Linux back in the days of Mandrake in 2003, I constantly came back to check on the progress of Linux until Ubuntu appeared on the scene and it helped me to really love it. You can reach me easily by emailing GamingOnLinux directly.
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Stella Jul 4
The fact that they can't even do proper testing is really disappointing. And kudos to the guy who found the 'bad hack' to get it to work without dlc. The fact that you have to do manual file editing to get a game to work in multiplayer though... yikes.

Btw, Fromsoftware, where is the other promised 'hotfix' for Steam Deck users? Do you not realise that Steam Deckers make up a pretty big part of your playerbase?

Last edited by Stella on 4 July 2024 at 12:49 pm UTC
I only have some perfomance problems here and there.
Don't know, mostly i can play without issues, but after a while there's a sudden FPS drop, in the most cases, when i rotate the camera.
bisbyx Jul 4
For me, installing the DLC was enough to resolve this. Didn't even have to verify integrity.

Also, if all it is doing is checking if a file exists, and not the contents of the file, that seems like a terrible anti-cheat.
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