Play mutant selection, you will be a completely different series that will continue in the form of a buff that the weapon we are showing in the game. You need to make your selections very carefully while fighting and your weapon damage while using the Weapon You must choose the best and the maximum level of the creature. To do this level and you will advance to the mutant elections in the first place. A good gun, a laser gun if you use it straight you can hang on you adventure. To kill mutated creatures, just calculate the distance to reach the gun and shoot you in the head for good.