Sonic the Hedgehog 2 (World) (Rev A) [Hack by SMTP v0.50] (~Sonic 2 SMTP) ROM

Sonic the Hedgehog 2 (World) (Rev A) [Hack by SMTP v0.50] (~Sonic 2 SMTP) is a game that was originally published by Sega. This game features Sonic the Hedgehog, Miles "Tails" Prower, and Knuckles the Echidna (additionally a pair of Sonic the Hedgehog and Miles "Tails" Prower) in an all-different stage collection.

Back on the days, way back to 2002, one user named SMTP decided to ensemble a group of talented people, to create an amazing Sonic 2 mod. The product, unfortunately, went on unfinished, but what is available to play is amazing.
Enter Sonic 2 SMTP, a Sonic 2 mod that adds features that were desired by Sonic hackers since the start of the community, like a more interactive options screen, modification of 2P zones and more.
It also contains several graphics, map layout and coloring changes, adding support for Elemental Shields (as seen on Sonic 3). However, the highlight of this mod is the ability to change difficulties, and with that the amount of rings, enemies and the speed of bosses in the zones.
All in all, and excelent product, incomplete, but awesome. A must try for Sonic fans and gamers.