I Just assassinated someone right after they where in armour lock and guess what no achievement. I cant seem to get any achievements with this new update is do what i need to do but no achievement
Thanks 
You were on the right might?
I just got that one last night.
He was in Armour lock comes out seconds later i melee him in the back dies right away and no achievement
> He was in Armour lock comes out seconds later i melee him in the back dies right away and no achievement
Yes, but what map was it on?
Breakneck/BTB
> Breakneck/BTB
It must be done on a defiant map. Not an Anniversary map.
Oh fair enough thanks. i will try the other achievements now.
This site can help you understand which Achievement is done where. On Halo Reach.
Also glad I could help!
Just to clarify:
Defiant achievements do NOT work on Noble Maps.
Defiant Maps - Highlands and Condemned are the only MP maps.
Anniversary Maps:
Beaver Creek / Battle Canyon
Hang 'Em High / High Noon
Damnation / Penance
Timberland / Ridgeline
Prisoner / Solitary
Headlong / Breakneck