Board Thread:General Discussion/@comment-46091810-20201006061044/@comment-9605025-20201006182452

Achievements is a Fandom-custom feature that had to be rewritten in order to work on UCP. It is not clear what the future of it will be. Fandom may or may not intend to re-add the custom tracks feature. The primary goal in adding it to UCP was to make sure that badges earned on legacy wikis are not lost. So yes, badges you get while on a legacy wiki will save.