K-1 World GP 2005 is a single-player and multiplayer fighting game in which players engage in realistic kickboxing matches, utilizing a variety of punches, kicks, and special moves to defeat opponents. In this game, the setting is based on the K-1 martial arts tournaments, featuring fighters from around the world competing in intense, fast-paced bouts. It stands out with its detailed character animations, authentic fight mechanics, and a comprehensive roster of fighters, offering advanced gameplay elements such as strategic move timing and stamina management.