Athena Co.

Athena Co. Ltd. is a Japanese video game developer, founded in July 1987.

Game Boy Color

 * Yakouchuu GB

Nintendo GameCube

 * Mahjong DX II

Nintendo 64

 * Dezaemon 3D
 * Pro Mahjong Kiwame
 * Yakouchuu 2: Satsujin Kouru

PlayStation

 * Waku Waku Volleyball

PlayStation 2

 * Pro Mahjong Kiwame Next
 * Gambler Densetsu Tetsuya DIGEST

PlayStation 3

 * Pro-Mahjong Kiwame Final (working title)

Sega Saturn

 * Dezaemon 2

Super NES

 * Kaite tukutte Asoberu Dezaemon
 * Super Bowling
 * Yakouchuu

Virtual Boy

 * Virtual Bowling

WonderSwan

 * Pro Mahjong Kiwame

Game Boy Color

 * Pocket Bowling
 * Yakouchuu GB

Nintendo GameCube

 * Mahjong DX II

Nintendo 64

 * Dezaemon 3D
 * Dezaemon DD
 * Pro Mahjong Kiwame
 * Super Bowling
 * Yakouchuu 2: Satsujin Kouru

PlayStation

 * The Quiz Bangumi

PlayStation 2

 * Pro Mahjong Kiwame Next
 * Gambler Densetsu Tetsuya DIGEST

PlayStation 3

 * Pro-Mahjong Kiwame Final (working title)

Saturn

 * Dezaemon 2

Dreamcast

 * Professional Mahjong Kiwame D (プロ麻雀 極Ｄ)

Super NES

 * Biometal
 * Dezaemon
 * Strike Gunner S.T.G
 * Super Bowling

WonderSwan

 * Pro Mahjong Kiwame