The Thieves Guild Add-on for The Elder Scrolls Online has 6 achievements worth 220 gamerscore.
Assist each member of the Thieves Guild in resolving personal matters.
Complete quests, defeat bosses, and explore delves to become the Hero of Hew's Bane.
Complete quest "Prison Break" in Hew's Bane.
Complete 1 heist for the Thieves Guild without being detected.
Join the Thieves Guild by completing quest "Partners in Crime" in Hew's Bane.
Steal every treasure from Kari's Hit List and place them all within the Thieves Den.