Raiden Densetsu (SNES, Prototype)

This is a prototype build of Raiden Densetsu, the Japanese version of Raiden Trad for the Super Nintendo. The cartridge was bought off of the Mercari marketplace by atrocity3010 and was sent to Jonas Rosland at Hit Save! for inspection. In the video below, you can see the prototype has many differences compared to the retail release — right down to the title screen. A deeper analysis can be read below.

The prototype can be downloaded here.

Special thanks to Jonas Rosland and atrocity3010 for providing help in researching these materials.

Game Details

Raiden was originally a vertically-scrolling arcade shooter released in 1990 by Seibu Kaihatsu, a development company founded back in 1982. Development began after it became apparent that Kaihatsu’s previous title — the 1989 arcade action game Dynamite Duke — was not selling enough to warrant a sequel. According to graphic designer Toshinobu Komazawa in a 2006 interview with INH Group, despite shooter games being “relatively inexpensive to produce,” the divergence from Dynamite Duke 2 to Raiden surrounded production with a swarm of negativity.

“In other words, Raiden was a financial decision for the company — a title we had to make.”

~ Toshinobu Komazawa, as translated by

Raiden was a commercial success, selling over 17,000 arcade units worldwide. Several ports got introduced for home consoles like the Sega Genesis and the Atari Jaguar. A Super Famicom port got released as Raiden Densetsu (or “Legend of Raiden”) on November 29th, 1991. The North American version (“Raiden Trad”) saw store shelves the following March and was met with moderate reception. “Simultaneous two-player play is a nice change of pace,” read the June 1992 issue of GamePro. “But super slowdown mars the fun. […] Although there is nothing new or different here, [Raiden Densetsu] packs more than a few hours of good shooter action.”

The lack of copyright information at the title screen is one of many noticeable differences found in the prototype.

As of this article, two prototypes of Raiden Densetsu are known to exist: one found and dumped by The Cutting Room Floor in August of 2020; the other being presented to you today by Gaming Alexandria. Courtesy of atrocity3010, here are all the differences they were able to spot:

  • The startup sequence fades from the title screen to itself repeatedly. Normally it shows a high score table. as well as a demo of the Level 1.
  • Normal is misspelled “Noroal” in the options screen. That difficulty also seems to match up with the hardest difficulty — pro mode —in this prototype.
  • The homing missiles are significantly slower in the prototype compared to retail.
  • Stage 5 soft locks after you complete it. Normally there is a cinematic sequence as you transition to Stage 6, where you can’t move. But in the prototype, you can move. When the screen goes to transition to Stage 6’s space background, the game soft locks. The game also soft locks after you exhaust your continues.
  • The lives/bombs/credit option allows for different values in the prototype.
  • Invulnerability can be obtained during any stage by chance — or possibly by dying. We’re unsure whether this is a bug or is intentional.

If you can spot any other differences that we may have missed, let us know! Thanks once again to atrocity3010, whose contributions made this release possible!


Download the ROM here.


For scans of the cart please go here.

About Dylan Mansfield

Dylan Mansfield has been a writer and historian for Gaming Alexandria since 2018. For preservation inquiries, contact Dylan at @thatdylanfellow on Twitter

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