Insurgency: Sandstorm is a team-based, tactical FPS based on lethal close quarters combat and objective-oriented multiplayer gameplay. Experience the intensity of modern combat where skill is rewarded, and teamwork wins the fight. Features Sequel to the indie breakout FPS Insurgency, now with 5 million units sold. Sandstorm is reborn, improved, expanded, and bigger in every way. Character and weapon customisation to show your battle-hardiness. Unprecedented audio design with positional voice-chat for realistic teamwork, and heart pounding ambient audio to bring you into the battlefield. Peek around corners, tactically breach doorways, use smoke to cover your team’s advance, and call in air support. Battle across expansive maps in up to 16-versus-16 player game modes, or 8 player co-operative against AI, now with machine gun mounted drivable vehicles. Competitive multiplayer features including matchmaking, broadcasting UI, and replays.

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.