Halo 3 achievement issue. Need help

[Joshua h]

I have every achievement for Halo 3 except the overkill. Its not that I cant do that in a ranked free for all, its that it wont give it to me. I checked my stats at bungie.net and I have overkill medals in the ranked chest and I repeatedly get overkills in lone wolves and it wont unlock, any help?
Absolutely, alot of the SVR achievements were stuck for me to, could it be Elite or games?

 

[Chongor]

thats weird, but are u super sure that its not working and your getting overkills?

 

[Fez]

First, check you armor permutations. if that is the last thing you need, you will unlock the katana sword, right? check to see if its there. if it is, there was just a problem with physically seeing the achievement getting unlocked.

If not, its possible that you need to win when you get the overkill. If you have already done that, the only other thing I can think of is you have to do it on a certain map/with a certain weapon.

I'm sorry if these dont help. I own halo 3, but I dont play for achievements so I havent really read them all.

Really hope this helped, because i know how cool that sword looks on someones back!