We're excited to announce that we've fully migrated the Xbox Forums to their new home, here on the Microsoft Community forums!
As of today, going to forums.xbox.com will redirect you here to the Xbox area of the Community forums. We've moved all of your existing threads over so you can continue and start conversations with the new forums experience.
We sincerely appreciate the feedback you have provided over this transition and can't wait for you to check out the new Xbox Forums!
In addition to Ewok's suggestion, have you checked here on xbox.com to see if the achievements appear against the game?
It could be that they have unlocked locally but weren't connected to LIVE at the time so haven't synced them up. Usually unlocking another achievement in the game while connected (on wifi for example) restores this but I'm not sure how easy it would be to
unlock the next achievement.
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