Sorry for repeating what's already in here, but there are just too many posts to read.
I just finished on realistic and didn't get the achievement.
Since I rarely play games on the hardest setting, I was quite shocked to not get the achievement (interpret shock as wanting to cry).
I don't have the PFC achievement either but this obviously isn't as hard to get.
For those who want to reply, could you let me know if there is any progress on getting this fixed...
Thanks.
Your tears; They do nothing to me...