C.H.A.O.S (Combat helicopter assault operational simulator) is a multiplayer helicopter simulation game

The game offers a wide range of combat helicopters for piloting and combat employment in various combat conditions. The basic platforms for the C.H.A.O.S game are iOS 4, 5, Android 3.0, Windows 7, Mac OS (Leopard, Snow Leopard, Lion).

http://www.chaos-game.com/en