Just a question:
You know when you choose between, Casual, Hardcore and Insane it says.. you can pull off a headshot etc. Well I've noticed, that when you shoot certain Locusts in the head, they don't die. And I mean in the head, standing still. Some of them have those helmets, and they come off, and you gotta shoot again to kill them.
Also, in Casual, is it just me or is it much harder to get a headshot than in Insane?