The Bespin arena features John Williams's alternate, unused version of 'Sail Barge Assault' from the soundtrack of Star Wars: Episode VI - Return of the Jedi (1983)
The term Teräs Käsi is based on the Finnish word "teräskäsi", which translates to "steel hand".
After this game, the martial art Teräs Käsi made its appearance in several Star Wars related works, such as books and comics, that now belong to the Legends continuity. The game Star Wars: Uprising (2015) adapted Teräs Käsi into the official canon and made its first live action depiction in Solo: A Star Wars Story (2018).