Step back to the island on which we have conducted various experiments on both animals and humans. All would be well if the result of all of this, because all the test subjects have turned into vile monsters and want to destroy the base on which it is subjected to this. This is understandable, but that there are still people who do not wish such a fate. What would help the remaining survivors, you have to place around the base of the guns that will kill the enemy. If you do it right, then you will be able to save the day.