The floppy disk version would ultimately be released a few years later in 1988 as part of Konami Game Collection Vol.

King's Valley is a platform game with puzzle elements, in which the player controls an archaeologist exploring a tomb in search of jewels.

To reach the hidden gems, the archaeologist must use special tools, such as pickaxes, which allow him to dig through brick walls.

There are a total of 15 rooms in the game, some of which occupy two screens, and only after collecting all the jewels on the level, the door to the next stage opens.

[5] MSX Extra reviewer complained that in some moments, the main character lacks speed of movement, especially when pursued by fast blue mummies, which greatly complicate the gameplay.