GreXXL Oh, I didn't know it was marked as abandoned. In fact, I'm using User Badges without any issue right now, but I agree that merging both extensions into one well-maintained, potentially FoF-supported extension would be a great idea. Honestly, I haven't used Achievements. User Badges is quite complex and has an option that allows you to use images, so you can move from classic badges to something more akin to achievements, but it would be good to thoroughly review everything to achieve feature parity.
hrvoje_hr Yes, I agree, Askvortsov idea with AutoMod to keep all that logic separate so it can be reused by more extensions is conceptually stronger, and I think it significantly reduces the maintenance burden on extensions like User Badges/Achievements.