Mahjong, a game that originated in China, is commonly played by four players (with some three-player variations found in Korea and Japan). The game and its regional variants is widely played throughout Eastern and South Eastern Asia and has a small following in Western countries. Similar to the Western card game rummy, mahjong is a game of skill, strategy and calculation and involves a certain degree of chance.

The game is played with a set of 144 tiles based on Chinese characters and symbols, although some regional variations use a different number of tiles. In most variations, each player begins by receiving thirteen tiles. In turn players draw and discard tiles until they complete a legal hand using the fourteenth drawn tile to form four groups (melds) and a pair (head). There are fairly standard rules about how a piece is drawn, stolen from another player and thus melded, the use of simples (numbered tiles) and honours (winds and dragons), the kinds of melds, and the order of dealing and play. However there are many regional variations in the rules; in addition, the scoring system and the minimum hand necessary to win varies significantly based on the local rules being used.

Simple 2000 Series Vol.004 - The Double Mahjong Puzzle is a puzzle game with 2 different kind of puzzles based on mahjong. In both games there is a time limit and when is reaches zero is game over.
- Gekitoride: Here the goal is to put together mahjong pieces of the same kind and make them dissapear. In this mode there are 2 different modes (Arcade & Infinity).
- Space: This time the game is in 3d, the goal is to clear the cube joining 3 mahjong pieces taken from the cube (Arcade & Border).

• First person perspective.
• 2D graphics
• Cartoon graphics
• Mahjong theme.

GEKITORIDE CONTROLS:
Move cursor: D-Pad
Select piece: Circle Button
Cancel action: X Button
Pause menu: Triangle Button

SPACE CONTROLS:
Move cursor: D-Pad
Select piece: Circle Button
Change between kind of pieces: X Button