Mappy is a 1983 arcade game by Namco. In the United States, it was distributed by Bally/Midway. Mappy is a side-scrolling platform game that features cartoon-like animals, primarily cats and mice. The game's main character itself is a mouse. Mappy runs on Namco Super Pac-Man hardware, modified to support horizontal scrolling. The name 'Mappy' is likely derived from mappo, a Japanese slang term (slightly insulting) for a policeman.
The player guides Mappy the police mouse through the mansion of the cats called the Mewkies (Meowky in the U.S. version) to retrieve stolen goods. The player uses a left-right joystick to move Mappy and a single button to operate doors. The mansion has six floors of hallways in which the stolen items are stashed. The items come in pairs; should Mappy get paired items one after another, the point values of the second matching item gets a multiplier. The second item of a pair will blink if retrieving it will yield a multiplier. The more the player retrieves matching items without dying, the bigger the multiplier gets. Therefore, ideally a player will start with the lowest value item (tape player for 100 + 100 × 2) and proceed to the highest value item (safe for 500 + 500 × 6) in order to get the highest value items with the biggest multiplier, for a total of 8500 points. Mappy and the cats move between floors by bouncing on trampolines at various places in the house. Both Mappy and the cats can land on a floor on the way up, but not on the way down. When they pass in the air, Mappy is unharmed by the cats, but should Mappy run into a cat anywhere else, he will lose a life.
As there are 256 rounds, like in Pac-Man and other 8-bit arcade games, the last round's play is normal, but harder than usual. When the player finishes the round, which is also known as 'Round 0,' the first round appears again.
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