@mrpibb: I tried to add episode 2 & the season pass for The Wolf Among Us. On a side note, when I tried to add the publisher/developer, I was getting nothing until I fully spelled out Telltale Games. I did not try to add any other games, or modify anything that exists.
Let me also just add that I did not receive any kind of notification about your response. Figured that since you're here I'd add that just in case.