Underwurlde is a 1984 action-adventure platform video game in the "Sabreman" series by Ultimate Play the Game for the ZX Spectrum and Commodore 64. The player controls the adventurer Sabreman as he jumps between platforms in a castle and its caverns to find an escape past the exit guardians. "Underwurlde" features about 600 flip screen areas. Unlike other games of its time, Sabreman is not injured when touched by enemies and is instead knocked backwards. "Underwurlde" is the second game in the series, between "Sabre Wulf" and "Knight Lore", and released alongside the latter for the ZX Spectrum during Christmas in 1984. Another developer, Firebird, ported the game to the Commodore 64 the next year.