Klax Japan is a puzzle video game released in arcades in 1990 by Atari Games while Namco distributed the game in Japanese markets. It was designed and animated by Mark Stephen Pierce with the software engineering done by Dave Akers. The object is to catch colored blocks tumbling down a machine and arrange them in colored rows and patterns to make them disappear. Klax Japan was originally published as a coin-op follow-up to Tetris, about which Atari Games was in a legal dispute at the time.

The Atari 2600 version, released in mid 1990, and Fatal Run, are the final releases for the console which was discontinued in early 1992.

Gameplay – Klax Japan

Controls consist of a four-position joystick and a button. The player controls a small paddle at the lower end of a constantly running conveyor belt. Using the joystick, the player can move the paddle left or right to catch tiles in various colors as they advance down the conveyor. Below the paddle is a well that can hold up to 25 tiles in five columns of five; pressing the button causes the topmost tile on the paddle to fall directly downward and into the well, as long as that column is not full.

The goal is to form “Klaxes”, or unbroken horizontal/vertical/diagonal lines containing three tiles of the same color. Doing so awards points and causes those tiles to disappear, allowing any tiles above them to fall toward the bottom of the well. Bonus points are awarded for completing multiple Klaxes with a single tile (including lines of four or five matching tiles) and for Klaxes formed by the falling of already-placed tiles.

Klax Japan

The paddle can hold up to five tiles at any given moment. The player is penalized with one “drop” whenever a tile falls off the conveyor without being caught or while the paddle is full. Pushing up on the joystick will flip the topmost tile on the paddle a short distance up the conveyor, while pulling down accelerates the motion of the tiles.

The game consists of 100 waves, presented as 20 groups of five waves each. At the start of the game and after every fifth wave, the drop meter is cleared and the player is presented with three options of which wave to play next; choosing a later wave awards bonus points and allows more drops. Each wave has an objective that must be reached, such as making a set number of Klaxes, scoring a certain number of points, or surviving a set number of tiles. At the end of a wave, bonus points are awarded for each tile still on the conveyor and paddle and for each empty space in the well.

Development -Klax Japan

Akers programmed Klax Japan in just a few weeks using AmigaBASIC, then ported each line to C. In a 1990 interview, he said he wanted to “produce something playable, compact and relatively quick to develop”. His influences were Tetris and tic-tac-toe. He chose the name from the sound tiles make rolling across the screen.

Atari Games released Klax in February 1990, with Namco releasing the game in Japan a few months later, and soon called it a “major arcade hit”. It quickly released several home versions under the Tengen brand. Akers created the Nintendo Entertainment System and Genesis editions. Some 16-bit conversions feature improved graphics.^{[citation needed]} Klax received the Parents’ Choice Foundation’s seal of approval in 1990, won Best Mind Game at the 1991 European Computer Leisure Awards, and Dennis Lynch of the Chicago Tribune named Klax the Best Cartridge of 1990.

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