Sonic The Hedgehog 2 [Mega-Play 07] (c) 1993 Sega.
The nefariously evil scientist Dr. Ivo Robotnik is at it again with his demented goal to conquer the world by forcing innocent animals to become evil 'badniks' (robots), and only one speedy hedgehog is eager enough to put a stop to Robotnik's scheme and his name is Sonic The Hedgehog. and this time he's not alone, Miles Prower (miles per hour, get it?). The Fox who's commonly known as 'Tails' because he has 2 tails which enable him to fly has decided to tag along with Sonic in order to bring peace back to the planet.

>>> TECHNICAL DETAILS
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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 224 pixels
Screen refresh : 60.00 Hz
Palette colors : 96
Players : 2
Control : 8-way Joystick
Buttons : 3

>>> TRIVIA
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Unlike the Sega Genesis version of Sonic The Hedgehog 2, the Mega-Play port has several differences such as the omission of the timer.
Official Sega Mega-Play releases list :
[Mega-Play 01] Sonic The Hedgehog
[Mega-Play 02] Golden Axe II
[Mega-Play 03] Grand Slam - The Tennis Tournament
[Mega-Play 04] Tecmo World Cup
[Mega-Play 05] Streets Of Rage 2
[Mega-Play 06] Bio-Hazard Battle
[Mega-Play 07] Sonic The Hedgehog 2
[Mega-Play 08] ???
[Mega-Play 09] Shinobi III - Return of the Ninja Master
[Mega-Play 10] ???
[Mega-Play 11] Mazin Wars
[Mega-Play ??] Columns III - Revenge of Columns
[Mega-Play ??] Gunstar Heroes

>>> OTHER GAME RESOURCES
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Game's rom.