Toru Iwatani designed Pac-Man at Namco in 1980 to be a game his friends would play — not another shooter. The result is a maze, 240 dots, four ghosts and one rule that turns the whole thing around: eat a power pellet and for a few seconds you are the one doing the chasing.
The four ghosts are not interchangeable. Blinky follows you directly. Pinky aims at the tile ahead of you and cuts you off. Inky's target depends on both your position and Blinky's, which makes him the erratic one. Clyde chases until he gets close, then wanders off. Learning which colour is behind you is most of the game.
Blinky (red), Pinky (pink), Inky (cyan) and Clyde (orange). Each uses a different targeting rule, which is why they do not travel as a pack.
240 regular dots plus 4 power pellets.
The arcade original breaks at level 256, where a counter overflow fills the right half of the screen with garbage. It is known as the split-screen or kill screen.
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