such as altering the names of the ghosts. The biggest of these was the game's title; executives at Namco were worried that vandals would change the “P” in Puck Man to an “F”, forming an obscene name. Masaya Nakamura chose to rename it to Pac-Man, as he felt it was closer to the game's original Japanese title of Pakkuman. In Europe, the game was released under both titles, Pac-Man and Puck Man. When Namco presented Pac-Man and Rally-X to potential distributors at the 1980 AMOA tradeshow in November, executives believed that Rally-X would be the best-selling game of that year. According to Play Meter magazine, both Pac-Man and Rally-X received mild attention at the show. Namco had initially approached Atari to distribute Pac-Man, but Atari refused the offer. Midway Manufacturing subsequently agreed to distribute both Pac-Man and Rally-X in North America, announcing their acquisition of the manufacturing rights on November 22 and releasing them in December. Ports Pac-Man was ported to a plethora of home video game systems and personal computers; the most infamous of these is the 1982 Atari 2600 conversion, designed by Tod Frye and published by Atari. This version of the game was widely criticized for its inaccurate portrayal of the arcade version and for its peculiar design choices, most notably the flickering effect of the ghosts. However, it was a commercial success, having sold over seven million copies. Atari also released versions for the Intellivision, VIC-20, Commodore 64, Apple II, IBM PC, TI-99/4A, ZX Spectrum, and the Atari 8-bit family of computers. A port for the Atari 5200 was released in 1983, a version that many have seen as a significant improvement over the Atari 2600 version. Namco released a version for the Family Computer in 1984 as one of the console's first third-party titles, as well as a port for the MSX computer. The Famicom version was later released in North America for the Nintendo Entertainment System by Tengen, a subsidiary of Atari Games. Tengen also produced an unlicensed version of the game in a black cartridge shell, released during a time where Tengen and Nintendo were in bitter disagreements over the latter's stance on quality control for their consoles; this version was later re-released by Namco as an official title in 1993, featuring a new cartridge label and box. The Famicom version was released for the Famicom Disk System in 1990 as a budget