These Aliens would cause an Apocalypse ?
The very 1st movie that came out was good with a good ending. We're supposed to believe these Aliens would cause the end of the world ?
The sensitivity to sound is by far their biggest weakness. They would fall for any and all traps. Land Mine, Pit trap, Spikey thing crushing them, Steel Cage, etc. You just throw a rock where you want them to die. Dead.