Sonic the Hedgehog 2 Tips

Getting All Chaos Emeralds Easily Without Cheating
Note, you should set it to "Sonic Alone" so it will be easier to complete the Special Stages. On the first few stages of the game (preferably Emerald Hill Zone 1 & 2 and Chemical Plant Zone 1 & 2) get 50 or more rings and do as many Special Stages as possible. Then purposely get a Game Over and restart (DO NOT TURN OFF THE GAME!). When you get a Game Over, the game will save the amount of Chaos Emeralds you were able to get, which is why it's important to not turn the game off or you will lose your Chaos Emeralds. Repeat this process until you get all the Chaos Emeralds. At this point (if you did this process on earlier stages) you will be able to go through most of the game as Super Sonic.