This is realistic Combat helicopter assault operation simulator - short name C.H.A.O.S.In C.H.A.O.S HD you will step into pilot's shoes and experience fierce air combats while flying one of the most hardcore helicopters in the world. There is a newest version in AppStore appear C.H.A.O.S Tournament HD https://itunes.apple.com/us/app/c.h.a.o.s-tournament-hd/id573902728?ls=1&mt=8 Engaging in a dogfight against an attack helicopter may sound easily trivial on paper and in theory, but when it comes to reality...think again!NOTE: C.H.A.O.S HD minimal requirements: iPhone 4S and iPad 2 only. If you have an older device, download C.H.A.O.S.A secret organization named C.H.A.O.S has been established by the dictators who lost their power and now they aim at world domination. As a brave pilot, you've been hired to prevent them from expanding their influence to other countries. You're about to take this challenge and save the world from terror!Choose helicopters from different manufacturers from the USA, Russia and Europe such as AH-64 Apache, UH-60 Black Hawk, Hind, Ka-52 Alligator, RAH-66 Comanche and more! Accomplish missions, go through intensive air combats and defeat the enemy!Achieve new ranks, get money and gain experience, upgrade your helicopter and deter your enemy!Features: - The HD version of C.H.A.O.S features crisper graphics and higher-res textures- Realistic helicopter simulator with action packed gameplay- Highly detailed helicopter models from different manufacturers - Award-winning visual and sound effects - Real-world battle locations - Eight training missions to get ready for real air combat frenzy - Helicopter upgrades - Exciting multiplayer mode: Death MatchThe entire world is under attack. And you're here to save it from terror!