Can they hurt human turrets? bug maybe?
Alright, after playing most of the day and night away, I have yet to kill a single human turret with any of the alien ranged attacks - from needle-spines to acid-rockets, it doesn't do anything to human turrets.
Running up, using teeth or claws - that did the trick, but after lobbing a half-dozen bile-bombs into the room, not one turret I ran up to was scratched.
I didn't read anything in the manual about human turrets being impervious to alien ranged-attacks, so I'm assuming its a bug of some sort.
Anyone else had the same thing happen?