At the end of Act 1, Halsin comes with you to solve a problem. I'm on my second playthrough, and I've not found a single clue as to how to solve that problem. Halsin doesn't have any new lines from the Goblin Camp until the end of Act 2, when he stays behind - because I didn't solve it for him.
I'm not looking for the solution, just a hint as to where to start on this. I've been over all of the Act 2 region, it was lots of fun - But I want Halsin, dammit.
