Augmented reality shooter game

Earth, 2013 ...
It has not reached the end of the world as expected, BUT ...
A mad and pissed scientist named Pinchet has made a terrifying discovery:
Thanks to his U-SML-6 apparatus we have discovered that we are not alone. On Earth have appeared strange creatures invisible to the naked eye that feed on human souls.
Luckily you can incorporate the U-SML-6 to Android devices and use it to defend against invading souls before they devour your own.