Board Thread:General Discussion/@comment-29342734-20161213010640/@comment-18172179-20161215030909

Only admins can see and modify the badges for achievements. The closest you can get to see all the badges available is by looking at the Unused Files special page, although there is no description about the badges in that list or how to earn them. Also, keep in mind that there might be some old badges that are no longer available.