They are more vulnerable to the Flak Gun (which exclusively targets Aerial Units), as well as Infantry and defenses that target all units such as Salvo and Machine Gun.īeing a helicopter, the Cobra moves rapidly and is very responsive. Several turrets, such as Railgun, Howitzer, and SAM will not target them either. Helicopters are immune to the effects of Landmines and do not trigger them. As an aerial unit, it provides more gameplay options. The Cobra is the first helicopter able to be built by the player.