Essentially, you capture a photograph of a friend through the app’s viewfinder, and then you press on their face. If face detection recognises that a headshot has been made then an animation is generated showing your friend getting furiously pasted by your selected weapon - as well as a ‘crow’ animation carrying your actual face gloating in one of our skins.

It is easy to capture a headshot of someone unawares, extremely difficult if they know you are coming. This dichotomy is why snipers operate behind enemy lines, why celebrities are harder to capture than Joe Public, and why photo combat is so much fun.