This teeny-tiny article needs some work. You can help us by expanding it.
Publisher(s) of original games: Irem
Developer(s) of original games: Irem
Original system(s): Arcade Boards
Sound driver: SCSP/CD-DA (40 tracks)
Number of players: 1-2
(ぐっすんおよよ・Ｓ) is a puzzle-platform game released for the Gussun Oyoyo-S Sega Saturn. It is an updated port of Irem's Gussun Oyoyo, known in the west as Risky Challenge. It was originally known simply as .
Gussun Oyoyo-S was followed by .
Zoku Gussun Oyoyo
Main article: Gussun Oyoyo-S/Magazine articles.
Sega Retro Average
Weekly Famitsu (JP)
(JP) Sega Saturn Magazine
Sega Saturn Magazine (readers) (JP)
File:SSM_JP_19960322_1996-05.pdf, page 229
File:SnGwSISDRZK Book JP.pdf, page 15