Columns [Mega-Tech 36] (c) 1990 Sega.
The rules are simple. A column of 3 square pieces stacked one on top of the other is dropped into the play area. The player can move this piece left and right as it falls (as in 'Tetris'), but cannot rotate it. Instead, pressing a button will cause the order of the blocks to shift by one position.
The object of the game is to place columns at the bottom of the pit in such a way that lines of 3 or more same-coloured blocks are created (either horizontally, vertically or diagonally). When this happens, these blocks disappear, and any blocks resting upon them immediately fall in accordance to gravity. Often this will cause additional lines to be arranged, producing a cascade effect. The key to a long game (and therefore a high score) is to set up these cascades.

>>> TECHNICAL DETAILS
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Cabinet dimensions :
Width : 53 cm.
Depth : 76 cm.
Height : 176 cm.
Weight : 113 Kg.
Sega Mega-Tech hardware
Game ID : Mega-Tech No. 36
Main CPU : 68000 (@ 7.670442 Mhz), (2x) Z80 (@ 3.57954 Mhz)
Sound Chips : YM3438 (@ 7.670442 Mhz), (2x) SN76496 (@ 3.57954 Mhz)
Screen orientation : Horizontal
Video resolution : 320 x 416 pixels
Screen refresh : 60.00 Hz
Palette colors : 96
Players : 2
Control : 8-way joystick
Buttons : 3

>>> TRIVIA
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Mega-Tech System list of games :
[Mega-Tech 01] Altered Beast
[Mega-Tech 02] Space Harrier II
[Mega-Tech 03] Super Thunder Blade
[Mega-Tech 04] Great Golf
[Mega-Tech 05] Great Soccer
[Mega-Tech 06] Out Run
[Mega-Tech 07] Alien Syndrome
[Mega-Tech 08] Shinobi
[Mega-Tech 09] ???
[Mega-Tech 10] After Burner
[Mega-Tech 11] Thunder Force II MD
[Mega-Tech 12] ???
[Mega-Tech 13] Astro Warrior
[Mega-Tech 14] ???
[Mega-Tech 15] ???
[Mega-Tech 16] ???
[Mega-Tech 17] ???
[Mega-Tech 18] ???
[Mega-Tech 19] ???
[Mega-Tech 20] Last Battle - Legend of the Final Hero
[Mega-Tech 21] World Championship Soccer
[Mega-Tech 22] Tetris
[Mega-Tech 23] Ghouls'n Ghosts
[Mega-Tech 24] Super Hang-On
[Mega-Tech 25] Golden Axe
[Mega-Tech 26] Forgotten Worlds
[Mega-Tech 27] Mystic Defender
[Mega-Tech 28] The Revenge of Shinobi
[Mega-Tech 29] Parlour Games
[Mega-Tech 31] Arnold Palmer Tournament Golf
[Mega-Tech 32] Super Real Basketball
[Mega-Tech 33] ???
[Mega-Tech 34] ???
[Mega-Tech 35] Tommy Lasorda Baseball
[Mega-Tech 36] Columns
[Mega-Tech 37] ???
[Mega-Tech 38] E-SWAT Cyber Police - Enhanced Special Weapons and Tactics
[Mega-Tech 39] Super Monaco GP
[Mega-Tech 40] Moonwalker
[Mega-Tech 41] Crack Down
[Mega-Tech 42] ???
[Mega-Tech 43] Shadow Dancer
[Mega-Tech 44] Arrow Flash
[Mega-Tech 45] ???
[Mega-Tech 46] ???
[Mega-Tech 47] Alien Storm
[Mega-Tech 48] Wrestle War
[Mega-Tech 49] Bonanza Bros.
[Mega-Tech 50] ???
[Mega-Tech 51] Streets of Rage
[Mega-Tech 52] Sonic The Hedgehog
[Mega-Tech 53] Fire Shark
[Mega-Tech 54] ???
[Mega-Tech 55] ???
[Mega-Tech 56] ???
[Mega-Tech 57] Golden Axe II
[Mega-Tech 58] Joe Montana II - Sports Talk Football
[Mega-Tech 59] Mario Lemieux Hockey
[Mega-Tech 60] Kid Chameleon
[Mega-Tech 61] ???
[Mega-Tech 62] Sonic The Hedgehog 2

>>> GAME PORTS TO OTHER SYSTEMS
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* Consoles :
Nintendo Wii (2006, 'Virtual Console')

>>> OTHER GAME RESOURCES
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Game's rom.
Machine's picture.