Nintendo World Championship 1990 is a special edition cartridge containing versions of Nintendo's Super Mario Bros., Square's Rad Racer, and Alexey Pajitnov's Tetris, the three NES games used in the Nintendo World Championship. Ninety gray cartridges were manufactured for semi-finalists, while 26 gold cartridges--similar to the well known gold Legend of Zelda cartridges--were manufactured for the winners of a Nintendo Power contest. The cartridge sold in this week's auction is one of the incredibly rare gold units. Gray copies of the game have previously sold for several thousands of dollars.
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