King of Fighters '98 Ultimate Match is an updated version of the original King of Fighters '98, and runs on the Taito Type X arcade hardware.
King of Fighters '98 is one of the most popular games in the long running King of Fighters series, with the game still retaining a devoted following. Ultimate Match includes additional characters not featured in the original version of the game, such as Eiji Kisaragi from KOF '95, along with Kasumi Todoh and the Boss Team (Geese Howard, Wolfgang Krauser, and Mr. Big) from KOF '96, as well as the boss characters Goenitz and Orochi, essentially including all the characters featured in the KOF series prior to KOF '98.
