I got quite a few achivements but here are my most recent i think:
Ghillies in the mist-Yes its easy but i usually prefer to kill things violently
Look sharp
Eyes and ears
Im too lazy to do most of them, mile high club got annoying after a few times so meh
To shreds you say?
Anyways, I think I'm getting the hang of the Mile High Club achievement, even though I haven't beat it, I'm learing what to do each time I get to a new situation, etc.
@ The Shot, I did what Ho-oh said and I made it to where the Heli comes, but right before I picked up MacMillan(who is invincible), I got killed by a grenade . So I was to angry to keep playing, but I will try it again soon.
I think beating these two are actually possible now.