During a recent visit to Irrational Games, studio head Ken Levine said part one will be out "before the holiday" and there's still uncertainty about episode two. Irrational's Director of Marketing Leonie Manshandan said, "It's not done yet, we don't have a date yet."
We covered some of the details (no spoilers) of episode one in our video preview. Episode two will have players take a walk in Elizabeth's shoes. The two packs are priced at $14.99 apiece, but can also be purchased in the BioShock Infinite Season Pass.
Bioshock Infinite - Burial at Sea (10/4/13)