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Pac-Man (パックマン) is a 1980 arcade game developed by Namco. It became incredibly successful to the point that it saw ports to consoles of the time and continues to see ports — made in-house, officially licensed, and homebrew — to today's systems. The only port of the game to a Sega system, however, was an in-house port to the Sega Game Gear in late 1990 (consequently, it was released early 1991).
On an interesting note, Sega's 1982 arcade game Ali Baba and 40 Thieves runs on modified Pac-Man hardware.
The basic goal of Pac-Man is to eat all the dots (or pellets) in a maze, avoiding ghosts. By eating a power pellet, Pac-Man is able to eat the ghosts as well for a short period, and the ghosts will then respawn from the center of the screen. Levels are completed once all the dots are eaten, and extra points can be achieved by eating fruit.
Versions
The Game Gear version of the game is relatively faithful, though due to the smaller resolution, graphics are smaller in size and the full maze cannot be shown without scrolling. This problem can be addressed by selecting 1/2 screen size where the graphics are drawn smaller but the full maze is displayed at once.