Buy ArmA 2 Combined Operations - SteamArmA 2 Combined Operations - Steam

Compatible with Day Z Mod for best experience.

Built upon over 10 years' experience, Arma 2 thrusts gamers into the heart of the most realistic military combat simulation ever developed, featuring cutting edge technology, vast, detailed environments and authentically modeled units, weapons and vehicles. Branching, player-driven campaigns offer both solo and cooperative gameplay, accompanied by a huge range of single and multiplayer modes.

Day Z Mod: http://store.steampowered.com/app/224580/

Arma 2:
The 27th MEU Marines deploys to Chernarus, country in the middle of civil war; an elite 5-man Force Reconnaissance Team, “Razor”, is among the first to fight. Caught between the might of the USMC offshore and the Russians anxiously watching from the north, the fate of Chernarus balances on a razor's edge...

Unrivalled realism: accurate ballistics; dynamic weather & environmental effects.
300+ weapons, models, air, land & sea vehicles!
Unmatched Landscape: 225 km2 of detailed real-data environment
Advanced AI: no scripts, no predefined pathways!
Intuitive, powerful mission editor with a dedicated creative online community

Arma 2: Operation Arrowhead:
3 years after the conflict in Chernarus, a new flashpoint explodes in the Green Sea Region. Coalition forces led by the US Army are deployed to Takistan. Enlist into various roles within the US Army, from basic infantrymen, through special operatives, to pilots and tank crew!

New SP and MP campaign & scenarios
3 new large scale maps of Central Asian setting.
Dozens of new vehicles and weapons
Thermal imaging and new weapons optics
Controllable Unmanned Aerial Vehicles (UAV)
Deployable backpacks for equipment
Extensive multiplayer: join in the massive multiplayer battles with up to 50 players!