: If you are looking for the original 1992 PC (MS-DOS) port, it is generally considered "abandonware," but the arcade versions found in the collections above play much better on modern hardware.
: This is the most comprehensive "full version" experience, containing every arcade iteration of Street Fighter II (Original, Champion Edition, Hyper Fighting, Super, and Super Turbo). It is available on Steam and frequently goes on sale. street-fighter-2-free-download-pc-game-full-version
: Several retro gaming archive sites host the arcade or console versions of Street Fighter II to play directly in your browser without needing a download. : If you are looking for the original
: You can often download the base Capcom Arcade Stadium for free on Steam, and then purchase Street Fighter II as a standalone DLC or as part of a bundle. : Several retro gaming archive sites host the