The Definitive Guide to Repelling Alien Invasion?

First step, you need to capture an alien. Just like when we use round-up in the yard, we can spray it and kill weeds, but it doesn't have any effect on us. (Hopefully, anyway). It's possible that the weapon you steal may not have any effect on them. So, you have to find out what it's weaknesses are, does it experience pain, what hurts the most, and, finally, figure out what kills it.