Complete the indicated task to unlock the corresponding item.

Item	How to unlock
Excalamune	Complete "Awesomesmithing" during Act IV.
Harbor Vat Capacity Upgrade	Complete the "Boat Upgrade" optional quest during Act III.
Hepcat's Vats Capacity Increases	Complete the "Hepcat's Upgrade" optional quest during Act II.
Old Factory District Vat Capacity Upgrade	Complete the "Brewery Upgrade" optional quest during Act I.
Samurai Helmet	Complete the "Fall of Emperor Norton" during Act II.
Vat Capacity Upgrade	Complete the "Theater Upgrade" optional quest during Act IV.