Check if you are running a 32- or 64-bit version of Windows to determine which installer you should use. If you choose to use Mega, click the green Download button towards the bottom right of the page, wait for the download to complete, then allow downloads from that site if prompted. If you choose to use a mirror, the file will start downloading directly from the Super Smash Flash site. If necessary, allow downloads from the site.
If you are using a Mac and your computer says the app cannot be opened because it is from an unidentified developer, open System Preferences, click Security and Privacy, then click Open Anyway. For various other Mac errors, check the downloads page on the Super Smash Flash site for solutions.
After you have launched it for the first time, you will only need to run the commands in steps 15 and 16 in the Terminal to play in the future.
