Bring back the old-school achievement UI. Based on the 1.11.2 source code. I have restored the features of the old version as much as possible.
However, advancement is quite different from achievements, so I made some adjustments (mainly regarding the logic for spreading achievement nodes).
It comes with the achievements 'Taking Inventory,' 'Getting Wood,' and 'Benchmaking,' and changes the 'Advancement' text to 'Achievement'
It has a config. Allows you to choose either the early achievement UI style or the late achievement UI style.
You can use it freely in the modpack.
Как поиграть с друзьями с модом Classic Achievement?
Мод Classic Achievement куда интереснее в компании: поднимите сервер Майнкрафт с уже установленным модом, позовите друзей и играйте по своим правилам. Хостинг Майнкрафт для мода Classic Achievement будет готов за пару минут - BungeeHost сделает всё за вас.

