The Omega Stone Riddle of the Sphinx 2

The Omega Stone Riddle of the Sphinx 2 is a unique game in the platformer genre. Not only does the story mode advance, but there are a number of secret side quests to complete. As you collect the Chaos Emeralds, you will receive more levels of power-ups to help you achieve these goals. These secret levels will open up secret secret areas that you might not have noticed otherwise. It's actually quite fun and addicting, and the fans of the game will probably appreciate it even if it isn't strictly the same.