 The player fights enemies in mahjong matches once, and there is a slight adventure element, best exemplified by the rubber chicken pulley section.In 2002, an erotic anime entitled "Viper GTS" was created by Studio G-1 Neo, released as three episodes with 30 minutes running time for each, except the last which was 31 minutes.The anime follows the series' most famous protagonist, Carrera, as she accidentally falls in love with a human with only a single penis.