ARMA II: Combined Operations by Bohemia Interactive

The 27th U.S. Marine Expeditionary Unit have been deployed to the post soviet republic of Chernarus: a small country chained to the threat of an upcoming civil war. Force Reconnaissance Team "Razor" is among the first to fight. This elite team is about to fall down the rabbit hole, trapped in a war not only for control of the country, but also the hearts and minds of its people. With the might of the USMC offshore and Russia anxiously watching from the north, the stakes couldn't be higher. The fate of Chernarus is balanced on a razor's edge...

• Player-driven story: Players will have the opportunity to command members of Force Recon Team Razor through a branching campaign full of twists and surprises.
• Reality check: Bohemia Interactive's standard 225 square kilometers of highly detailed sandbox landscape, modeled with stunning detail and precision and using real-world geographical data, covered by 235 megapixels of accurate aerial maps (15,360² pixels) and more than 1 million objects.
• Authentic military simulation: the game simulates various aspects of combat and environment effects such as bullet ballistics and deflection, material penetration, tracers, varying ammunition types and stopping power, supersonic bullet crack and weather conditions.
• Live war: the campaign missions can be experienced in cooperative mode, or join for duty in the massive multiplayer battles with up to 50 players. Among standard MP modes is Warfare, introduced in ArmA: Armed Assault, a unique combination of RTS and tactical FPS game.
• Unlimited Creativity: Intuitive, easy-to-use built in mission editor, together with powerful modding tools, infinitely extends the lifespan and gameplay of ARMA II and moves it far above the classical gaming experience. ARMA II allows players to create completely new models without any limitation. All mods can be shared with other players in dedicated and creative ARMA gaming community.

ARMA II: Operation Arrowhead
Three years after the conflict in Chernarus, portrayed in the original Arma II, a new flashpoint explodes in the Green Sea Region. Coalition forces led by the US Army are deployed to Takistan to quickly restore peace and prevent further civilian casualties.You will enlist into various roles within the US Army, from basic infantrymen, through special operatives, to pilots and tank crew in this new installment in the award winning line up of military simulators for PC from Bohemia Interactive.

Building on 10 years of experience and constant engine development, Arma II: Operation Arrowhead boasts the most realistic combat environment in the world. It models real world ballistics & round deflection, thermal imaging, materials penetration, features a realtime day/night cycle and dynamic wind, weather and environmental effects.

• New Playable Content: New story campaign for both SP and MP gameplay. Wide range of new tutorials, single scenarios and multiplayer modes.
• Massive Game World: Three brand new Central Asia-style large maps including expansive urban, desert and mountainous terrain featuring a fully destructible and interactive environment.
• Extra Units and Vehicles: Multiple factions for all sides including US Army, United Nations, Takistani Army and Guerrillas making a collection of 300+ new units, weapons and vehicles.
• Ultimate war experience: Fully integrates with the original Arma 2 for unmatched warfare simulation.
• Unique gameplay elements: Detachable backpacks with equipment, advanced weapon optics, material penetration modelling, remote real-time simulation of Unmanned Arial Vehicles (UAV), freedom of decision and repercussive actions.
• MISSION EDITOR: Design your own missions by the intuitive, easy-to-use mission editor and become part of one of the biggest and most creative PC gaming community ever.
• EXTENSIVE MULTIPLAYER: Play the campaign missions in cooperative mode or join duty in the massive multiplayer battles with up to 50 players.
• CHEAT PROTECTION: Optional anti-cheat BattlEye (http://www.battleye.com/) available to help secure dedicated servers. In addition BE adds 'RCON' (remote control) for game's dedicated server software.
• DEDICATED SERVER: To support smooth multi-player experience there is 'dedicated server software' available for Windows (included with game) and Linux (download-able from game's website).