The First Descendant
24 Achievements
1000
60-80h
Xbox One
Xbox Series
Knock, Knock! Who is it?
Complete all available missions and Descendant duties in Vespers
30
2.25%
How to unlock the Knock, Knock! Who is it? achievement in The First Descendant - Definitive Guide
The, Pants, Party
Story related and can not be missed.
Note: For some reason there are only achievements tied to the first three zones in the game's campaign. You'll need to continue the story to unlock the other areas to get crafting materials and continue to level up your character and account Mastery though, so be sure to finish all the zones.