Sonic travels to the distant shores of Never Lake for the once-a-year appearance of Little Planet – a mysterious world where past, present, and future collide through the power of the Time Stones that lie hidden within it. Sonic arrives only to find the once beautiful world imprisoned beneath a twisted metallic shell. His arch-nemesis, Dr. Eggman, has come for the Time Stones and with them, will soon have the power to control time itself! In order to put an end to Dr. Eggman’s nefarious schemes, Sonic must use the power of Little Planet to travel through time; breaking Dr. Eggman’s hold over the future by destroying his machines in the past and recovering the missing Time Stones! 1. Go to: http://store.steampowered.com/ and download STEAM client.
2. Click “Install Steam” (from the upper right corner)
 Download Steam
3. Install and start application, login with your Account name and Password (create one if you don’t have).
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4. Please follow these instructions to activate a new retail purchase on Steam:
  Launch Steam and log into your Steam account.
  Click the Games Menu.
  Choose Activate a Product on Steam…
  Follow the onscreen instructions to complete the process.
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If you have any problems regarding key activation, please contact our Live Support.