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 Voidstones socketed in your Atlas.
Defeat Sirus, Awakener of Worlds.
Defeat The Black Star.
Defeat The Infinite Hunger.
Defeat The Searing Exarch.
Defeat The Eater of Worlds.