Waiting for moments when enemies are facing away from their comrades is another way to buy you precious seconds before the bodies are noticed.
Missions
The key to completing many of the tougher missions is to work out the order in which enemies will fire, for some are quick on the draw. The fastest has to die first.
Sludgy gyroscopic aiming
Do not bother with the sludgy gyroscopic aiming. Switch to the joystick option for more accurate, if still rather sluggish, aiming.
