Alexey Pajitnov's Welltris (c) 1991 Video System.
A fun and addicting puzzle game from the creator of the hugely popular 'Tetris'.

>>> TECHNICAL DETAILS
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Main CPU : 68000 (@ 10 Mhz)
Sound CPU : Z80 (@ 4 Mhz)
Sound Chips : YM2610 (@ 8 Mhz)
Screen orientation : Horizontal
Video resolution : 352 x 240 pixels
Screen refresh : 60.00 Hz
Palette colors : 2048
Players : 2
Control : 8-way joystick
Buttons : 2 (TURN, DROP)

>>> TRIVIA
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This arcade game is a port from an original computer game released in 1989 on the Atari ST.

>>> GAME PORTS TO OTHER SYSTEMS
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* Computers :
Commodore Amiga (1992, 'Action Masters')

>>> OTHER GAME RESOURCES
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Game's rom.