Operation Flashpoint: Red River Game Keys

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.

Stand together with the US Marines in Operation Flashpoint: Red River, the ultimate tactical infantry shooter. You’ll play as one of four distinct and complimentary classes in a Marine Fireteam – Grenadier, Scout, Rifleman and Automatic Rifleman - as you embark on an epic campaign. Take on huge sandbox battlefields in the new setting of Tajikistan, a geopolitical hotspot bordered by Afghanistan and China. Face the unpredictable threat of all-new insurgent enemies and the might of the world’s largest Army, the Chinese PLA. Use authentic tactics on your own initiative in solo or in four player drop-in, drop-out co-op campaign. For extended replayability, Operation Flashpoint: Red River also includes new class choice, load-out personalisation plus standalone co-op Fireteam Engagements. With a huge range of authentic weapons and the chance to call in devastating airstrikes, Operation Flashpoint: Red River will put you in the boots of a Marine like never before.