One of the world's most recognized and well-loved video game characters returns in this collection of original adventures. Join Sonic the Hedgehog in four of his classic titles, filled with wacky adventures and non-stop action. You'll be able to relive all of the excitement in one handy location with your Nintendo DS.This compilation includes Sonic the Hedgehog, Sonic the Hedgehog 2, Sonic the Hedgehog 3 and Sonic and Knuckles. Take on the role of Sonic or Knuckles as you battle challenging levels. Save your progress as you go so you don't miss any of the action. With these four titles in one game, you'll be able to complete the full Sonic experience from start to finish anywhere.