"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, Commodore VIC-20, Commodore 64, Apple II, IBM PC, Texas Instruments 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.