Wrong achievements and title update classification

Expedition league is a mini-expansion (or "league") that did not introduced any achievements. It just a bug fix that sync in-game achievement with Steam by adding these into Steam :

By real classification :

"King Cartographer" and "Sirus, Awakener of Worlds" belong to "Conquerors of the Atlas" expansion (title update) in December 2019

"Defeat The Maven" belongs to "Echoes of the Atlas" expansion (title update) in December 2020

Just to double check, Echoes of the Atlas is a separate update to Siege of the Atlas?

Path of Exile has (usually) annual end game expansion for the Atlas system

Maven the boss is still in-game but it is introduced in "Echoes of the Atlas" (patch 3.13)

It never a free "DLC" it is just title update that superseded the end game of previous year, which usually the end game boss can still be encountered as side boss

"Siege of the Atlas" is such patch. Just delayed from Christmas to February 2022 this year

if you really want to sort achievement by update:

Shaper is from "Atlas of Worlds" expansion which is version 2.4

Elder (and it endgame version Uber Elder) is from "War for the Atlas" expansion which is patch 3.1-3.2


The other 3 months patch usually does not have achievement tied to it, but yet again if you insist to sort, quite a lot of them are from the content that not exist at game ver 1.0 which is almost 10 years ago