Majoriko Inbikai Inbizone (1988)

Majoriko Inbizone (also known as Majoriko Inbikai, or “Majoriko in the Impure Zone”) is a side-scrolling action game with some mild RPG elements. Each of the game’s eight stages is open ended, as you hunt for keys to unlock the boss door, while defeating enemies to gain magic and gold. The game was developed by Natsume, in conjunction with Dynamic Planning, the studio owned by famed manga artist Go Nagai, known for his stylistic blend of horror and erotica. Majoriko Inbizone is actually fairly subdued though – it’s rather softcore, and while the first level has some grotesque imagery, the terror is undercut by the appearance of some goofy enemies