Dr. Eggman (AKA Dr. Robotnik) is once again turning the animals of Mobius into robots using his monstrous contraption, the Veg-O-Fortress. Only Sonic can penetrate the Pinball Defense System to free the animals, retrieve the Chaos Emeralds, and put a stop to Dr. Eggman’s fiendish plans!Go to: http://store.steampowered.com/ and download STEAM client
Click “Install Steam” (from the upper right corner)
Install and start application, login with your Account name and Password (create one if you don’t have).
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.
After successful code verification go to the “MY GAMES” tab and start downloading.