tour of the East Coast to visit gamers who claimed the ability to pass that level. None demonstrated such an ability. In 1999, Billy Mitchell offered $100,000 to anyone who could pass level 256 before January 1, 2000. The offer expired with the prize unclaimed. After announcing in 2018 that it would no longer recognize the first perfect score on Pac-Man, Guinness World Records reversed that decision and reinstated Billy Mitchell's 1999 performance on June 18, 2020. Remakes and sequels Pac-Man inspired a long series of sequels, remakes, and re-imaginings, and is one of the longest-running video game franchises in history. The first of these was Ms. Pac-Man, developed by the American-based General Computer Corporation and published by Midway in 1982. The character's gender was changed to female in response to Pac-Mans popularity with women, with new mazes, moving bonus items, and faster gameplay being implemented to increase its appeal. Ms. Pac-Man is one of the best-selling arcade games in North America, where Pac-Man and Ms. Pac-Man had become the most successful machines in the history of the amusement arcade industry. Legal concerns raised over who owned the game caused Ms. Pac-Man to become owned by Namco, who assisted in production of the game. Ms. Pac-Man inspired its own line of remakes, including Ms. Pac-Man Maze Madness (2000), and Ms. Pac-Man: Quest for the Golden Maze, and is also included in many Namco and Pac-Man collections for consoles. Namco's own follow-up to the original was Super Pac-Man, released in 1982. This was followed by the Japan-exclusive Pac & Pal in 1983. Midway produced many other Pac-Man sequels during the early 1980s, including Pac-Man Plus (1982), Jr. Pac-Man (1983), Baby Pac-Man (1983), and Professor Pac-Man (1984). Other games include the isometric Pac-Mania (1987), the side-scrollers Pac-Land (1984), Hello! Pac-Man (1994), and Pac-In-Time (1995), the 3D platformer Pac-Man World (1999), and the puzzle games Pac-Attack (1991) and Pac-Pix (2005). Iwatani designed Pac-Land and Pac-Mania, both of which remain his favorite games in the series. Pac-Man Championship Edition, published for the Xbox 360 in 2007, was Iwatani's final game before leaving the company. Its neon visuals and fast-paced gameplay was met with acclaim, leading to the creation of Pac-Man Championship Edition DX (2010) and Pac-Man Championship Edition 2 (2016). Coleco's tabletop Mini-Arcade versions of the game yielded 1.5 million units sold in 1982. Nelsonic Industries produced a Pac-Man LCD wristwatch game with a