Plot: Xak Precious Package: The Tower of Gazzel is a fantasy role-playing video game developed and published by the Japanese software developer MicroCabin. The game is a direct sequel to Xak: The Art of Visual Stage and Xak II: The Rising of the Red Moon. Wikipedia
Plot: Fire Hawk: Thexder - The Second Contact, also known as Firehawk: Thexder 2, Firehawk or Thexder II, is a video game developed and published by Game Arts for the MSX2, MS-DOS and PC-8801 in 1989 as a sequel to Thexder only in Japan. The MS-DOS version was later released by Sierra On-Line. Wikipedia
Plot: King's Valley II: The Seal of El Giza is a game for MSX1 and MSX2 computers by Konami. It is a sequel to King's Valley from 1985. The MSX2 version only saw a release in Japan. The same goes for a very rare contest version. Wikipedia
Plot: Xevious: Fardraut Saga is a 1988 vertical-scrolling shooter video game published by Namco for the MSX2 in Japan. An updated PC Engine version was released two years later. Wikipedia
Plot: Super Hydlide is an action role-playing game for the Sega Genesis/Mega Drive. It was originally released in 1987 in Japan only under the title Hydlide 3: The Space Memories for the MSX, MSX2, and NEC PC-88. It's the third game in the Hydlide series. Wikipedia