EDIT: I found a Steam Achievements guide that is pretty good.
Steam Community Post
https://steamcommunity.com/sharedfiles/filedetails/?id=28096...(Archive backup:
https://web.archive.org/web/20240924202551/https://steamcomm...)
(Archive backup 2:
https://archive.is/HRw2R)
This game has a decent wiki that is still updated in 2024. I am sure most people can find it on their own, but I wanted to leave a link here: maybe it can help someone who is stuck
Wiki/Main page
https://nehrim.fandom.com/Wiki/Achievements page
https://nehrim.fandom.com/wiki/AchievementsEDIT about 1 month later:
IF you are considering playing Nehrim... please do. This is one of the greatest RPG experiences I have ever had in 20+ years of gaming.