Klax is the arcade puzzle developed by Atari Games in 1990, in which the player must catch colored tiles falling down a conveyor belt and stack them on a platform to form lines of matching color, riding the wave of the block-puzzle boom that Tetris had set off.
This particular copy appears under the ZZZ-UNK prefix because it wasn't possible to confirm with certainty its exact revision among the cartridge's different documented editions.
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