Sonic the Hedgehog 2 (World) ROM

I can't remember having this much fun playing a single player platformer in a while. Sonic returns in this game with his friend, Tails. I actually played this game for almost 3 hours straight. You will be addicted to the fast gameplay, puzzles, music and all the action. Personally, level wise, this is my favorite Sonic games. You have your classic levels just as hills, power plants, mountains, mines, ruins, and casinos. I hope you enjoy this game as much as I do.

Sonic the Hedgehog 2 (World) is a game that was developed and published by Sega. This game features Sonic the Hedgehog and Miles "Tails" Prower (ready to defeat the mastermind (known as Dr. Robotnik)).

 
If you thought that the first Sonic game was awesome well think again, Sega really made Sonic Run to and all new level, polished what they already had and make it even better with 8 new levels, a new buddy named Tails Miles Prower and new bonus stages, winning on the bonus stages gives you a Chaos emerald, if sonic gathers all seven and gathers fifty rings he can transform in to Super Sonic! Faster and stronger going through the levels will be a breeze, but if all of the rings you have are consumed sonic will return to normal.
You can choose To go with sonic and tails as a team or you can go solo with sonic or tails and go head to head against the evil Dr. Robotnik and free all of the animals that have been captured be him and transformed in to robots to build his empire.
Vibrant colors, an awesome soundtrack and the huge speed of sonic make Sonic 2 one of sega’s best platformer games for the Sega Mega Drive/Genesis
 

The second Sonic game for the Genesis. This time, Sonic has a new friend known as Miles "Tails" Prower, who joins him on nearly every subsequent game. There is a new half-pipe special stage, where Sonic and Tails have to collect a certain ammount of rings to get the Chaos Emeralds. When you collect all 7 Chaos Emeralds, you get Super Sonic, a nearly invincible version of Sonic that is faster, jumps higher, and is immune to damage. This is also the first Sonic game with a 2-Player mode. Released on on November 20, 1992, also known as Sonic 2's Day.
Enjoy!

Following up the awesome first entry on the series, Sega releases Sonic the Hedgehog 2 on 1992. Building up on its predecessor's fame, gameplay and speed, it went to became one of the biggest sellers in Sega Megadrive/Genesis history.
This time, the formula is basically the same from the last installment, however, we got a new face here. Enter Miles "Tails" Prower, a small two-tailed fox (that can be controlled by player 2, or the CPU) who, amazed by Sonic attitude, speed and heroism, proclaims himself the sidekick of our blue hazed hero, while facing again the evils of Dr. Ivo Robotnik (Eggman in Japan), saving the world once again from total domination, via Dr. Robotnik's Death Egg.
However, Sonic changed and got faster. He got himself a new move under his sleeves, the spin dash. With this move he can roll, rev himself up in place and when released, he unleashes his full speed. Tails can do this too, actually.
Also, this time, the Chaos Emeralds are not merely for show or completionism sake. Get the 7 Chaos Emeralds in this installment, quite well hidden inside the half-pipe-like special zones, get 50 rings and jump: Sonic turns himself into Super Sonic, with invencibility (except to crushing, drowning or falling to pits), high jumps, hyperspeed and golden colored fur to match.
With 8 zones, 19 levels in total plus 7 special stages, a free for all with Robotnik's creation, Mecha Sonic and one last boss fight with the Dr. himself, this game is one of the longest, and most remembered entries in the whole Sonic series, sporting several of the most definite moves and gameplay, which would go on to define the shape of Sonic games for years to come.
Finally, to top it all, did you know this game has a 2 player versus racing mode? You can compete with Player 2 on who takes the shortest to complete one of 3 scenes, or who can grab more rings in the special zones.