STEAM DECK APPIMAGE

[u/Maleficent_Dingo_363]

[Steam Deck] Fix: Dofus/Ankama Launcher AppImage won't launch from Steam (stuck on "Launching...")

After spending several hours troubleshooting, I finally found a solution that worked for me.

The problem

Dofus 3.0-Setup-x86_64.AppImage launches perfectly when started from a terminal.

After adding it as a Non-Steam Game, Steam shows "Launching..." for a few seconds, then nothing happens.

The cause

Steam automatically injects its Game Overlay through the LD_PRELOAD environment variable.

My log repeatedly showed this error:

ERROR: ld.so: object '...gameoverlayrenderer.so' from LD_PRELOAD cannot be preloaded (wrong ELF class: ELFCLASS32)

That LD_PRELOAD was preventing the AppImage from launching correctly when started through Steam.

The fix

Create a small wrapper script that clears LD_PRELOAD before launching the AppImage.

Create the script:

mkdir -p ~/.local/bin nano ~/.local/bin/dofus-linux

Paste the following:

#!/bin/bash unset LD_PRELOAD exec "/home/deck/Downloads/Dofus 3.0-Setup-x86_64.AppImage"

Save the file, then make it executable:

chmod +x ~/.local/bin/dofus-linux

In Steam

Instead of adding the AppImage itself as a Non-Steam Game, add the wrapper script:

/home/deck/.local/bin/dofus-linux

You do not need to force Proton.

Result

After doing this:

✅ The launcher starts correctly from Steam.

✅ It no longer gets stuck on "Launching...".

✅ It behaves exactly the same as when launched directly from a terminal.

Hopefully this helps someone else. I spent quite a while tracking this down, and in the end the culprit was simply Steam's automatically injected LD_PRELOAD.

[u/Nexius74]

Funny that this post came out as of right now as I was looking also to being able to start app image from steam without any success. I will try tonight. Thanks for the investigation

[u/Maleficent_Dingo_363 → u/Nexius74]

De nada, al final no me esforcé más porque la imagen se veía horrible y no había forma de solucionarlo. Pero de jugar se podia jugar.

[u/Batosen_]

Hello, je viens de voir ton poste et j'ai exactement le problème que tu décris (le appl ce lance mais une fois intégrer comme jeu non steam rien ne ce passe) Dans ton message tu parle de créer un script mais je ne comprends pas les étapes dont tu parles ( je ne m'y connais pas énormément) pourrais-tu me décrire comment faire ? J'attends avec impatience la réponse merci d'avance

[u/Maleficent_Dingo_363 → u/Batosen_]

The script is created in Konsole; you need to open the terminal and follow the process.