halo 4 achievement glitch.......

I just completed my 25th challenge for halo 4 online, and the achievement didn’t unlock. help please?

Mine popped on 28. Just keep doing challenges. You will get it.

Can you explain to us a little more what your problem is, like what achievement you “unlocked”, were you online/offline, etc.

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Good luck getting help, you’ll probably get a warning or something from a Moderator…BUT TO KEEP THIS ON TOPIC, can you explain to us a little more what your problem is, like what achievement you “unlocked”, were you online/offline, etc.

I was online.