Weaknesses Of The Enemy

1) Aliens: Usually they have a pretty squishy head and mid section so it would be best to aim at those areas when attacking them. They have super brain powers so I would advise to not attack them from behind because they will be able to sense you.

2) Zombies: They are very stupid. They don't know what is going on because their brains were sucked out when they turned to the "dark side", so you could easily outsmart them. Don't underestimate them though because their ability to change you happens quickly and you can't fight back.
Aim at these areas of the enemy and you will be sure to have a victory!