Metroid Game
In this retro NES game with a space theme, defeat Kraid and Ridley and then get to Mother Brain.
Sonic 2 Time Attack
Pick any level and complete it as quickly as you can. has a space for records so you may keep track of your progress.
Sonic Black And White
All the color has been absorbed by Eggman! To return color and audio to their previous state, gather rings. Chaos Emeralds provide an action a lasting injection of color. Keep in mind that the first level is only intended to serve as a tutorial, demonstrating how Eggman can steal all color and how obtaining the rings can restore the level. Thereafter is the actual first level!
Sonic Scorched Quest
Sonic Burned Edition's trial version. The same plot and level design are present, but the flaming motif is absent.
Amy Rose in Sonic 1
For all the Amy Rose enthusiasts out there, there is a fun rom hack called Amy Rose in Sonic the Hedgehog (you know who you are). She possesses a large hammer to smash foes with in addition to being able to sprint and jump like Sonic. When she swings it, it even spits out hearts. Cute.
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
Mean Bean Machine
A slightly more challenging version of Dr. Mario's falling brick puzzle game.