Sonic 2 Hybridization Project Game
This hack combines Sonic 2 (16 bit) and Sonic 2 (8 bit), and it has updated graphics and emulates the 8 bit levels.
Sonic Games: Sega
Sonic 2 Chaos Adventure
Having only 1 new zone, but fantastic powerups like the snowboard, pogo spring, and rocket shoes!
Metal Sonic the Hedgehog
Sonic is swapped out for Metal Sonic with just a simple palette change. Sonic 1 is all that is there in this rom hack.
Sonic Ancient Isles
What if the events of Sonic 1 happened on a different island entirely? This hack has entirely new levels, sprites, and music for you to enjoy.
Sonic 2 The Lost Worlds
contains the seven zones from the original Sonic 2 that were removed: Dust Hill Zone, Rock Zone, Wood Zone, Winter Zone, Hidden Palace Zone, Casino Night Zone, and Cyber City Zone.
Five original levels and new music are featured in this succinct yet delightful Sonic 1 hack. Contains a few surprises as well as some new monitors.
Sonic Streets Of Rage 2
In this huge beat 'em up, battle your way through 8 stages of terrible guys. Select among characters like Amy, Knuckles, Tails, and Sonic.
Sonic Tails Double Trouble
This fantastic Sonic 1 rom hack lets you play as Sonic or Tails and features entirely new levels and music! average level of difficulty
Sonic Stardust Gear
A complete Sonic 1 rom hack with brand-new levels, music, and six new, difficult worlds to explore