De'Tranion's Baalor Ale is, as its name suggests, a type of ale popular in Baldur's Gate, brewed by De'Tranion.
Baldur's Gate[]
Captain Tollar Kieres asks Gorion's Ward to fetch him some of the ale from the Blushing Mermaid.
Baldur's Gate II[]
Three local boys in the Umar Hills, Dirbert, Neler and Valsben, ask Gorion's Ward to buy them three bastard swords and some of De'Tranion's ale to get them started on their 'adventuring career' during the side quest Idle hands in Imnesvale. It can be purchased from Min Minling inside the Umar Inn at night, or outside the Inn at his "stall" during the day.
A mug can also be found on a table in Renal Bloodscalp's area on the second floor of the Shadow Thief Guildhall in the Docks District of Athkatla.