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http://store.steampowered.com/app/33930/

About this game
Three years after the conflict in Chernarus, portrayed in the original Arma 2, a new conflict has matured in the field of Green Sea, and the coalition forces led by the US Army are sent to Takistan to quickly restore peace and prevent further civilian casualties.
You will be able to test themselves in the roles of the various US Army soldiers from the simple to the infantry commando, or a tanker pilot in the new part of the famous series of military simulators for PC from Bohemia Interactive.
With 10 years of experience and continuous operation of the engine, Arma 2: Operation Arrowhead boasts the most realistic in the world battles in open terrain. It simulates the physics of the real world, the interaction of materials, the temperature of objects, adding to it all day and night changes in real-time and dynamic wind, weather and environmental effects of different medium.
Note:
Arma 2: Operation Arrowhead is a standalone product and does not require the original Arma 2.
Key features:
NEW GAME CONTENT: The new campaign is for a single, and for passing a joint. A large variety of new training missions, single scenarios and multiplayer mods.


Huge game world: Three brand new large maps in the style of Central Asia, including saturated urban, desert and mountain scenery, filled with completely destructible objects to interact.


Incredible Battle Experience: Fully compatible with the original game ´Arma 2´ unparalleled simulation of combat operations.



Unique gameplay elements: Detachable backpacks with equipment, advanced optical sights, simulation of materials Simulation remote control unmanned aerial vehicles (UAVs) in real time, freedom of choice and rich gameplay.

NEW FIGHTERS AND TRANSPORT: A few groups for each of the parties: the United States Army, the United Nations, the army and the guerrillas Takistan together include more than 300 new fighters, weapons and equipment.


Mission editor: Create your own missions using a simple editor for the development of mission and become a part of one of the largest and most creative communities for PC games.


Creating mods: Create your own items for games using the free development kit and change the game the way you want.


EXTENSIVE MULTIPLAYER: Come campaign in cooperative mode or join a massive online battles, designed for 50 people.



PROTECTION Cheating: The optional protection against cheats «BattlEye» (http://www.battleye.com) is available for the protection of dedicated servers. In addition, it is «RCON» server remote administration system.


Dedicated servers: For a quieter game was provided software for dedicated servers available for Windows (included with the game) and Linux (available for download from the game site)