Arma 3 is delivered as Steam cd key after your purchase. Arma 3 activation and installation is done entirely on Steam. Internet connection is required. Experience true combat gameplay in a massive military sandbox. Deploying a wide variety of single- and multiplayer content, over 20 vehicles and 40 weapons, and limitless opportunities for content creation, this is the PC’s premier military game. Authentic, diverse, open - Arma 3 sends you to war. Buy Arma 3, join the action now.