Bishoujo Ken (also known as Beauty Fist) is a rare unlicensed puzzle-gambling game developed by Sachen. The gameplay revolves around the classic 'Rock-Paper-Scissors' mechanic where players challenge various anime-style female opponents. Winning matches allows players to progress through stages and unlock different illustrations. While simple in its core mechanic, the game is a notable piece of late-era 8-bit history, reflecting a specific niche of the Famicom's unlicensed market. (Note: Contains adult themes suitable for mature players.)