It's the ultimate Sonic celebration! Sonic returns in a new 2D platforming high speed adventure, and he's not alone! Developed in collaboration between SEGA, Christian Whitehead, Headcannon, and PagodaWest Games, experience new zones and remixed classic levels with Sonic, Tails, and Knuckles!
Pentium 4 1.6GHz
2 GB RAM
DirectX 9.0c compliant video card 32MB
400 MB available space
DirectX 9.0c Compatible
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.