- For fans of the classic SEGA game series Sonic and Knuckles: Sonic the hedgehog 2 World, comes this fun online game. Where you must help the classic red hedgehog to go through this new adventure. Dr. Help Knuckles complete 13 challenging levels and defeat the evil Dr. Eggman to save planet Earth. Watch out for obstacles, avoid traps and attack enemies to free the creatures. Have fun helping Sonic to get far in this dangerous game.
Enjoy the game Knuckles: Sonic the hedgehog 2 World, it's free, it's one of our Sonic the hedgehog games we've selected.