If the runtime is installed but you're still hitting errors, follow this "Verification" method to fix corrupted files: Find in your library. Click the Gear Icon (Properties) > Installed Files . Select Verify integrity of tool files .
To play online games like Apex Legends , Elden Ring , or Fall Guys on your Steam Deck, you often need the . This background tool bridges the gap between Windows-based anti-cheat systems and the Steam Deck's Linux-based operating system.
While Steam usually downloads this automatically when you install a supported game, it can sometimes fail, leading to "Easy Anti-Cheat is not installed" errors. This guide covers how to manually download and repair the runtime to get you back in the game. How to Download Proton EasyAntiCheat Runtime proton easyanticheat runtime steam deck download
If your game keeps kicking you or refusing to launch, follow these steps to manually download the runtime directly from your library:
Steam will scan and re-download any missing or broken components. Advanced Fix: Forcing Compatibility If the runtime is installed but you're still
In some cases, games won't recognize the runtime unless you use a specific version of Proton.
Navigate to your game in the library and select the > Properties . Go to the Compatibility tab. To play online games like Apex Legends ,
: If the "Install" button is greyed out, the runtime is already on your device. You may need to verify its files instead. Repairing EAC on Steam Deck