Sonic - The Lost Land is a version of Sonic the Hedgehog.
The game is comprised of 7 levels, each filled with traps and badniks intent on bringing down Sonic once and for all. There is also a special realm consisting of 6 Chaos Emeralds. If you have collected at least 50 rings by the time you finish the level, you will see a giant ring. Jump into it to be taken to the secret realm. A dynamic palette system is set up , making each act load its own palette (à la Chaotix), as well as a dynamic music system, allowing each act to load its own music.
Credit to Shadow Fire and team for their work on this game.