A good option of shooting games is undoubtedly Sky Defender available on www.flash-game.net for free. Use hotkeys 1234 to switch weapons. Click Spacebar for next replies. Press AMWCS or use mouse to alternate weapon control system. Click twice if you want to select the second weapon when two types of weapons are setting on one hotkey. Press left mouse button to make all other operations. Combine your weapons and begin the battle!