Klax is a puzzle video game released in arcades in 1990 by Atari Games. It was designed by Dave Akers and Mark Stephen Pierce. The object is to catch colored blocks tumbling down a machine and arrange them in colored rows and patterns to make them disappear. Klax was originally published as a coin-op follow-up to Tetris, about which Atari Games were tangled in a legal dispute at the time.
The Atari 2600 port, released in the summer of 1990, was, along with the game Fatal Run, the last game for the system before the console was discontinued in early 1992.