The Expert Vehicles Pack contains three models with very different characteristics for dealing with rocks, mud and the harshest environments. The Polaris RZR XP 1000 Trails & Rocks The Arctic Cat Alterra MudPro 700 LTD The Zordix Rock Crawler

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.