Full list of all 127 Path of Exile achievements. It takes around 200 hours to unlock all of the achievements in the base game on Windows.
The base game contains 120 achievements, and there are 3 DLC packs containing 7 achievements.
Accept The Maven's Invitation and defeat The Maven.
Have four Watchstones socketed in each Region of your Atlas.
Defeat Sirus, Awakener of Worlds.
Defeat The Black Star
Defeat The Infinite Hunger
Defeat The Searing Exarch
Defeat The Eater of Worlds