The multiplayer component, specifically the "Showdown" mode, was a highlight of the original release. While online servers are long gone, local play allowed friends to duel in classic Western standoffs. Emulators often allow for "Netplay," potentially reviving this experience over the internet.
“Unblocked games” generally refer to browser-based copies of popular titles hosted on third-party websites designed to bypass network filters (e.g., school Wi-Fi or office firewalls). These sites often use embedded emulators to run older console games — in this case, likely the PlayStation 2 or Xbox version of Red Dead Revolver. Red Dead Revolver Unblocked
Players search for “Red Dead Revolver Unblocked” hoping to: The multiplayer component
If you can’t access Revolver but want a similar fix — especially in a restricted environment — consider these browser-based or low-spec Western games: specifically the "Showdown" mode