Puyo Puyo
Platform: MSX 2
Region: Japan
Media: Disk
Controller: Keyboard
Genre: Puzzle 
Gametype: Undefined
Release Year: 1991
Developer: Compile
Publisher: Complie
Players: 1 - 2
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This is a falling pieces puzzle, Puyo Puyo originated on the MSX system and was later turned into an arcade hall version. Get four same-colored puyos touching each other to make them disappear. If more puyos of the same color are connected then they will disappear too. This game can be played simultaneously by two players for a competitive gameplay. Hinder your opponent by making multiple puyo combinations.
 
http://www.mobygames.com/game/msx/puyo-puyo