Kero Kero Keroppi no Daibouken translated Keroppi's Big Adventure. The popular Sanrio character gets his own game. Released on the Nintendo Famicom console in Japan in 1991. Big Adventure is a children's puzzle game where Keroppi must rescue his girlfriend Keroleen who is locked up in a castle. To do so, he must solve the action based puzzles in seven differently themed worlds. Followed by a sequel in 1993 also on the Famicom.