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: Annet Futatabi is a side scrolling, beat-em-up video game developed and published by Wolf Team for the Mega CD hardware add-on for the Mega Drive. It is the final in a trilogy of games that also includes Earnest Evans and El Viento. The game was released only in Japan in 1993. 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: Earnest Evans is a 1991 action platform game which was released in Japan for the Sega Mega-CD, and in North America for the Sega Genesis. The game was developed and published by Wolf Team in Japan, and was published in North America by Renovation. Wikipedia