Achievement won’t unlock

Here is the support page for this issue.
http://support.xbox.com/en-US/games/troubleshooting/troubleshoot-achievements-challenges You can scroll down and try each solution to solve this issue.

xD yeah tell us if the support page helped out

IS this still going on? I've seen sometimes peoples achievements take a bit to register

Hi there Fred,

Thanks for reaching out! I'm sorry to hear about the issue with achievements.

I recommend taking a look at the troubleshooting resource for
Problems
with Xbox One achievements and challenges.



If you still don't see your completed achievement or challenge, visit the
Xbox
Support Forums – Achievement Unlocking Issues for more troubleshooting solutions.



Try this out and let us know the results.

If it is just one particular achievement not unlocking and you have done everything you need to do to unlock it, and it doesn’t say “unlocked” on your achievement list, then it’s the game issue, not MS. UBI Soft were just being lazy and passing the blame.
Many UBI games have issues with achievements not working.

I am having a kind of similar issue. I completed the intro and fixed the radio tower. I got the achievement to pop up on my xbox, but when I go to my full list of achievements on the console, or xbox.com and it doesn't show the game as being played at all.
When I open the blade on the xbox it shows as completed and unlocked. It shows unlocked on club ubisoft also.

I also think this has hung up the rest of my achievements, I went back to play some FC4 and none of the things I was completing were unlocking achievements or showing progress on the xbox.

I already did the full instruction for the stuck achievement listed by DominumStige and replied to the survey.