Arma 3 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.

Hone your shooting skills and engage in ranged combat with the seven new weapons in the Arma 3 Marksmen DLC. Features Seven New Weapons - Five marksmen rifles and two medium machine guns offer new opportunities for squad-based gameplay. The new weapons are: Cyrus 9. 3 mm - high power marksman rifle MAR-10 . 338 - high power marksman rifle Mk-I EMR 7. 62 mm - medium power marksman rifle Mk14 7. 62 mm - medium power marksman rifle ASP-1 Kir - special purpose rifle SPMG . 338 - lightweight medium machine gun Navid 9. 3 mm - medium machine gun Scopes - The AMS and Kahlia medium range scopes complement both the new and existing weapons. Remote Designators - Two remotely-operated laser-designators can be used to spot and laser designate targets from afar. Ghillie Suits - New ghillie suits for the NATO, CSAT, and AAF factions provide camouflage for various terrain types. Firing Drills - Combine movement and medium range shooting in three new Purple Courses of Fire. Showcase Marksmen - Use your new abilities and long range sharpshooting skills in a tense reconnaissance mission. Supporting Content End Game Multiplayer Mode - A team-based multiplayer mode, containing experimental gameplay features such as Dynamic Groups, Shared Objectives, and Revive. Showcase Firing From Vehicles - Experience the Firing From Vehicles feature in an actual combat scenario for both singleplayer and co-operative multiplayer. VR Training - Three new courses to train up your weapon handling skill-set. Virtual Garage - Examine and customize the extensive collection of vehicles in Arma 3. Vests & Face Paints - Three new heavy and grenadier vests designed specifically for improved explosive shielding and ballistic protection. Nine new types of face paint are added to provide maximum concealment. Editor Objects - New shooting range objects for Arma 3 content creators, including VR (vehicle) targets, balloons, swivel and dueling targets, shooting mats, a shot timer, a bullet trap, and an air horn. Supporting Features Weapon Resting & Deployment - Benefit from a passive bonus to your accuracy while your weapon or arms are near any stable surface. Deploy your weapon firmly using bipods for the greatest precision possible. Improved Recoil & AI Suppression Simulation - Fire personal weapons with a greater feeling of power and authenticity. Observe Artificial Intelligence units suffer impaired combat efficiency when under fire. Sound Enhancements - Be immersed by a richer combat sound scape in different surroundings, at a distance, and under incoming fire.