The Greymoor Add-on for The Elder Scrolls Online has 4 achievements worth 180 gamerscore.
Complete quests, defeat bosses, and explore delves to become the Savior of Western Skyrim.
Locate and retrieve all 19 musical instruments and deliver them to the Bards College in Solitude.
Defeat Yandir the Butcher, Captain Vrol, and Lord Falgravn in Kyne's Aegis.
Complete Antiquities achievements.