Osomatsu-kun Hachamecha Gekijou

Osomatsu-kun Hachamecha Gekijou
Developers: Unknown (most likely Sega R&D2) Publisher: Sega Platform: Genesis Released in JP: December 24, 1988 This game has unused sounds. This game has debugging material.

Osomatsu-kun Hachamecha Gekijou (roughly Little Osomatsu: Nonsense Theater) is a platform game and one of the first four titles for the Sega Mega Drive (the Genesis didn't come out back then), based off the then-popular Osomatsu-kun manga.

You play as Osomatsu trying to save his many brothers (he literally has five) kidnapped by a duo consisting of a Frenchman and a short boy while venturing through a surreal world. Osomatsu is infamous among kusoge aficionados for not only having a confusing combo of maze level design and "clangy" sound, but also for having a disastrous development cycle and release, where over half of the entire game was cut.

As the game predates the TradeMark Security System, this game breaks on pretty much anything that isn't a pre-VA6 Model 1 Mega Drive.

And you thought Super Battletoads was rushed?

Missing Credits

Infamously, there was so much cut from the game due to switching to a small ROM size that unlike any of the games that came out during this time, the credits didn't even make it. Instead, the game cuts to the title screen after you beat the game. There is no remnant of them in the ROM itself, and no one knows who actually worked on Osomatsu.

Unused Jingles

Spread across the ROM (these were found when the .VGM rip by Project2612 was made) are various jingles. Their purposes are currently unknown.

Track number: 8A

A slow variant of the game over jingle.

Track number: 8C

A louder variant of the game over jingle, this time with more instruments.

Track number: 8D

A faster variant of 8C.

Track number: 8E

A short jingle, which bares little resemblance to the others in the game.

Track number: 90

A short fanfare.