If you use a 64 bit System(Steam Deck Users, Desktop Linux Users), Make sure you the Windows 64-bit portable version of Super Smash Flash 2 downloaded and extracted into its own folder.
- If you use a 32-bit System, Make sure you the Windows 32-bit portable version of Super Smash Flash 2 downloaded
- Extract The portable version into a folder somewhere.
Click Add a Game at the bottom left corner of the steam window

