Description: [Xbox Live Arcade] Sonic, the fastest blue hedgehog on earth, rocket through hair-raising loop-de-loops and take dizzying dives past bubbling lava, waterfalls and more in Sonic the Hedgehog Arcade. Gather up the rings and stop Dr.Eggman's (aka Dr. Robotnik) schemes for world domination. Enhanced version: Newly enhanced graphics bring this 1991 console classic to life as never before. Once again, you can thrill to Sonic's adventures, but this time in an updated environment.Leaderboards: Top Score leaderboards are there to keep track of your progress. All new achievements: Twelve new achievements, range from simple such as clearing the Green Hill Zone or collecting one hundred rings, to more challenging, such as trying to complete the game without losing a life. [Microsoft]