Nintendo World Championships is a legendary promotional cart created by Nintendo for a 1990 nationwide competition. The game contains modified versions of Super Mario Bros., Rad Racer, and Tetris, with a six-minute time limit to achieve the highest combined score. A unique feature is the "score" system – players compete in a tournament format, and the highest scores won prizes, including a trip to the championships. A trivia: Nintendo World Championships is the most famous and rare NES game, with only 116 grey cartridges and 26 gold cartridges produced, making it a holy grail for collectors. The graphics and music are the same as the original games. It is a historical artifact with immense value and significance in gaming history, representing the height of NES-era competitive gaming.