Plot: Heavy Nova is a 1991 video game for the Sega CD/Mega-CD, Sega Mega Drive/Genesis, and X68000 that combines elements of fighting games with platform games and mission elements. Players assume the role of a robot operator destined to earn the highest operator rank. Wikipedia
Plot: A-Rank Thunder Tanjouhen is an adventure game released in 1993 on Mega-CD. The game was developed by Riot and released by Telenet. The game's cover art was created by Yasushi Nirasawa, in his position as a model-builder for Hobby Japan magazine. Wikipedia
Plot: Black Hole Assault is a fighting video game developed by Micronet co., Ltd. for the Sega Mega-CD in 1992. The game is the sequel to Micronet's Heavy Nova, though focusing entirely on Fighting Game elements. Wikipedia
Plot: Formula One World Championship: Beyond the Limit, released in Japan as Heavenly Symphony: Formula One World Championship 1993, is a racing game developed and published by Sega, with production assistance from by Fuji Television, and released for the Sega CD in 1994. Wikipedia