You'll need to successfully complete each bonus stage in three parts in order to acquire the Chaos Emeralds. How do I find Chaos Emeralds in Sonic the Hedgehog 2? Jump into the lights and you'll enter the special stage, where you run down 3D tunnels, collecting coins and avoiding mines. Once you do, flashing lights will appear above it. This time around, you'll need to collect at least 50 coins - and still have them in your possession - and cross a checkpoint. It works a bit differently than in the first game, where you simply reached the end of the stage with a certain amount of coins and then jumped through a giant ring. How can I access the bonus rounds in Sonic the Hedgehog 2? On that note, here are some tips that will help you get through the game. In addition to superior controls, the presentation is much closer to the original Genesis classic.
With Sega's re-release of Sonic the Hedgehog 2, the publisher managed to right the wrongs that plagued the previous mobile edition of the game.
Sonic the Hedgehog 2 - Review | Cheats And Tips