Tetris

Sega’s arcade version of Tetris was a phenomenal success in Japan, prompting multiple extra versions of the game. Less successful was Sega’s attempt and bringing this version to the Mega Drive. Much like Tengen’s NES version, sales were blocked in Japan, likely this time by Bullet-Proof Software, and it is thought that as little as only 10 cartridges were ever produced. What few copies survive are extremely rare, being sold in auctions for up to US$16,000.