Re: Sims 3 Achievements not Unlocking PC
@MadiiLuvhsYuh Your mods wouldn't have any influence on your ability to earn badges. What's more likely is that the file that keeps track of badges is corrupt and not recording your achievements properly. You can delete the file to regenerate a new one, although any progress towards other badges will also disappear. So if you have others you're trying to complete that take more work, like write a certain number of books, you might want to hold off until you either finish those or confirm that they're not going to work either.
Go into Documents\Electronic Arts\The Sims 3\Downloads, and you'll see two folders labeled with long strings of numbers. Each one may have a ChallengeData.package inside. Delete them both. The game will create new ones the next time you launch it.
By the way, since you're badge hunting, keep in mind that the "Who keeps sending these?" badge (find 10 messages in a bottle) is broken. It can't be completed except on disc installs that are only patched to 1.55, the patch level that was current when Island Paradise was released. Otherwise, there's no way to make it work.