(NOTE: This guide is going to assume you did not originally own a copy of FUSER, so you may only need to install Proton manually.)

Otherwise, quickly look up an alternative copy of the game through Internet Archive, as well as a copy of the DirectX Web Installer. Extract your copy of the game and insert the DirectX installer (dxwebsetup.exe) in the same folder as "FuserEOS-Win64-Shipping.exe". You should also need to drag in "UE4PrereqSetup_x64.exe" from the following file path: Fuser\Engine\Extras\Redist\en-us

Go back into steam and add the DirectX installer as a non-steam game, then go into properties>compatibility and click "Steam Play Compatibility". Run the installer like normal, then repeat this process for "UE4PrereqSetup_x64.exe" and remove both from library after.

Then, download Proton 6.21 GE with a program such as ProtonUp-Qt, and add "FuserEOS-Win64-Shipping.exe" as a non steam game. Open the programs launch properties, and add the following:


Finally, go into the compatibility tab and click "Steam Play Compatibility" again, as well as selecting Proton 6.21 GE in the drop-down tab and you are good to go!

Wanna add custom songs? No problem!

First, simply enter desktop mode and download the FUSER Song Loader [github.com] and insert it into *where the game is stored*\Fuser\Binaries\Win64. Next, create a folder in Fuser\Content\Paks and create a folder called "custom_songs".

Then enter steam and open your game's properties and add the following to the end of the launch commands:

Finally, download some customs in desktop mode, insert them into the custom_songs folder and enjoy!