Alexey Pajitnov's Welltris © 1991 Video System Company, Limited.
This arcade video game is a port from an original computer game released in 1989 on the Atari ST.
A fun and addicting puzzle game from the creator of the hugely popular Tetris.
Main CPU : Motorola 68000 (@ 10 Mhz)
Sound CPU : Zilog Z80 (@ 4 Mhz)
Sound Chips : Yamaha YM2610 (@ 8 Mhz)
Players : 2
Control : 8-Way Joystick
Buttons : 2
=> Turn, Drop
Welltris was released in March 1991 in the arcades.