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 player controls a small device which sits at the interface between the conveyor belt and the playing area, which can be moved left and right to catch the blocks and deposit them either in the playing area (which can hold 25 blocks in a 5X5 arrangement) or push them back up the conveyor belt. The device can hold up to five blocks. An uncaught block is considered a "drop". A flashing block can be used as a wildcard on any colour. In the playing area, blocks can be eliminated by arranging three or more of the same color into a continuous line, known as a "Klax." The line may be horizontal, vertical, or diagonal. A multiple grouping (e.g., one vertical and horizontal) counts as multiple Klaxes, as do Klaxes of four same-colored blocks (two Klaxes) or five same-colored blocks (three Klaxes). Once the goal is reached, bonus points are awarded for remaining blocks on the conveyor belt and device, and empty spaces in the bin (also, on levels where a certain point total is required, points in excess of the required amount are counted both in the scoring and as bonus points)