Previously I didn’t categorize Duolingo as a gaming achievement, but now I do! After 3 years, and topping leagues a long while ago, I’ve finally completed a whole ‘language’ on Duolingo (until they add more anyway). I completed using the Super subscription, which adds some more challenges I believe, but gives you unlimited tries and no ads. Where possible I got a score of a 1000 or 3 stars, without trying to take advantage of exploits.