Not an American user?


One day, Osomatsu's five brothers went missing. The mischievous Iyami, of course, must be behind this! With great haste, Osomatsu grabs his slingshot, and sets out to rescue his brothers and give Iyami a taste of his own medicine.

Osomatsu-kun: Hachamecha Gekijō (Nonsense Theater) is a side-scrolling action platformer based on the manga and anime created by Fujio Akatsuka, which plays similarly to Alex Kidd. The player controls the titular Osomatsu through outlandishly Japanese environments, fighting bizarre enemies, collecting ribbons to buy various items from hidden shops, and searching for his missing brothers. Each stage is made up of multiple areas; falling into holes in the ground leads to underground passages, and jumping onto flying shells leads up into the clouds. A boss waits at the end of each stage, usually just Iyami in some sort of strange disguise.


Osomatsu-kun: Hachamecha Gekijō Genesis Something of a boss, these guys are tougher.
Osomatsu-kun: Hachamecha Gekijō Genesis I lost all my lives. Game over.
Osomatsu-kun: Hachamecha Gekijō Genesis A much tougher boss.
Osomatsu-kun: Hachamecha Gekijō Genesis Funny manga

Promo Images

There are no promo images for this game

Alternate Titles

  • "おそ松くん はちゃめちゃ劇場" -- Japanese spelling

Part of the Following Group

User Reviews

There are no reviews for this game.

Critic Reviews

ASM (Aktueller Software Markt) Sep, 1989 7.7 out of 12 64
HonestGamers Jun 13, 2009 6 out of 10 60 Feb 17, 2011 5 out of 10 50


There are currently no topics for this game.


There is no trivia on file for this game.

雷堂嬢太朗 -raido.jotaro- (60760) added Osomatsu-kun: Hachamecha Gekijō (Genesis) on Jul 22, 2009