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January 09, 2026

Famicom Fridays: Altered Beast (獣王記)(Asmik, 1990)



Welcome back to Famicom Fridays, where we highlight a notable release from the Nintendo Famicom library each week. For entry #046, we’re looking at Altered Beast (獣王記 / Jūōki), SEGA’s mythological action classic that made its way onto Nintendo’s hardware in Japan.

From Arcade Hit to Home Console

Altered Beast first roared onto the scene as an arcade game in 1988, developed by SEGA AM2 under the direction of Yu Suzuki. It quickly became famous for its booming voice samples (“Rise from your grave!”), large sprites, and transformation-based gameplay.

The Famicom version, released in 1990 and published by ASMIK under license from SEGA, was a Japan-only release. While most players associate Altered Beast with the Sega Genesis/Mega Drive, this version shows how the game was adapted for Nintendo’s 8-bit hardware.

Gameplay Overview

Set in a mythological Ancient Greece-inspired world, players take on the role of a resurrected warrior tasked with saving Athena from the underworld god Neff. The core mechanic revolves around collecting Spirit Balls, which transform the hero into powerful beast forms.

Transformations include:

  • Werewolf

  • Dragon

  • Bear

  • Tiger

  • Golden Werewolf (ultimate form)

On the Famicom, the game was reworked to fit the system’s limitations, resulting in simplified visuals and sound while retaining the essence of the arcade experience.

A Unique Famicom Adaptation

Compared to the arcade and 16-bit versions, the Famicom release is slower-paced and more methodical. Enemy patterns are adjusted, and stages are redesigned to better suit the hardware. Despite these compromises, the game remains ambitious, especially given the Famicom’s technical constraints.

The box art, featuring the iconic beast transformations, stands out as one of the more striking covers in the Famicom library and reflects the game’s larger-than-life presentation.

Interesting Trivia

  • This is one of the few SEGA-developed properties officially released on Nintendo hardware during the late 1980s and early 1990s.

  • The Famicom version was never released outside Japan, making it a curiosity for international collectors.

  • Voice samples, a major highlight of the arcade version, were heavily reduced or removed due to hardware limitations.

  • Despite mixed reception compared to the arcade original, the game is praised for its ambition on 8-bit hardware.

Collectibility and Legacy

Today, Altered Beast on Famicom is a noteworthy collector’s item, particularly complete-in-box copies with manuals. Its cross-company licensing and unique place in gaming history make it especially appealing to fans of both Nintendo and SEGA.

More broadly, Altered Beast remains an enduring symbol of late-1980s arcade design and one of SEGA’s most recognizable early franchises.

Final Thoughts

For Famicom Fridays #046, Altered Beast stands as a fascinating example of how major arcade hits were adapted across competing platforms. While it may not rival its arcade or Genesis counterparts, its existence on the Famicom tells an important story about the era’s game industry and technological experimentation.

Join us next week for another Famicom Fridays spotlight as we continue uncovering the rich and varied history of the Famicom. 🎮✨

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