Race across land, sea, air, space, and time in Sonic Racing: CrossWorlds! Warp through Travel Rings into new dimensions where something new awaits around every twist and turn. Speed to victory solo or as a team in a variety of offline and online modes and compete against players from around the world. Build the ultimate machine to match your racing style, unlock gadgets to gain the upper hand, and unleash power-up items for the win!

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 "LIBRARY" tab and start downloading.