I earn’t this achievement and it re locked itself, I recovered my gamertag and the achievement still didn’t pop what the hell do I need to do unlock it again!?
Edit: after struggling for a few games, I got the achievement along with pump yer brakes as welll thanks for the advise guys
Bump, help please?
What did you do after you unlocked it first time like went next game or what? if something’s glitchy about that then i will help you out to unlock it again 
> What did you do after you unlocked it first time like went next game or what? if something’s glitchy about that then i will help you out to unlock it again
I was playing on the crimson DLC, and got the achievement for boarding the mantis but it re locked it self a couple of games later.
Really? hmm strange, it shouldnt be happen that you did board mantis but when i got it (i completed all achievements) and played few games later they are still unlocked so it probably was bug/glitched it’s same thing with ODST for example if i was ordering ordance to drop then it would unlocked ODST but some say that you would get it by shattering enemy with ghost so it is a bug but it is possible they fixed it cuz i was lucky enough killed enemy during airbrone from man cannon
but back to the issue, well have you tried do it again and see?
I unlocked “david and goliath” “odst” and “pump yer brakes” all at the same time and they wont show up on the xbox website and i havent gotten the 90gamerscore for this, they wont “re-lock” either so i can’t just unlock it again. 
> Really? hmm strange, it shouldnt be happen that you did board mantis but when i got it (i completed all achievements) and played few games later they are still unlocked so it probably was bug/glitched it’s same thing with ODST for example if i was ordering ordance to drop then it would unlocked ODST but some say that you would get it by shattering enemy with ghost so it is a bug but it is possible they fixed it cuz i was lucky enough killed enemy during airbrone from man cannon
>
> but back to the issue, well have you tried do it again and see?
I’m trying desperately but everyone is avoiding shatter which is really annoying me badly which is stalling me testing it out
> > Really? hmm strange, it shouldnt be happen that you did board mantis but when i got it (i completed all achievements) and played few games later they are still unlocked so it probably was bug/glitched it’s same thing with ODST for example if i was ordering ordance to drop then it would unlocked ODST but some say that you would get it by shattering enemy with ghost so it is a bug but it is possible they fixed it cuz i was lucky enough killed enemy during airbrone from man cannon
> >
> > but back to the issue, well have you tried do it again and see?
>
> I’m trying desperately but everyone is avoiding shatter which is really annoying me badly which is stalling me testing it out
well, i will be home soon after i’m done with my final in my afternoon class from college then I will help you out promises just dont worry about that achievement just play games let it naturally happen if you’re lucky enough but what is your timezone?
> I unlocked “david and goliath” “odst” and “pump yer brakes” all at the same time and they wont show up on the xbox website and i havent gotten the 90gamerscore for this, they wont “re-lock” either so i can’t just unlock it again.
Fixed it! If you are having this problem, delete your gamertag off your xbox then simply re-download it. You have to unlock the achievement(s) again but at least they will count this time.
It happened to me too, but with some of the campaign achievments