I have been through here and can't find any new territory to explore / root out bad guys. I have found a chest which needs a key but can't find that key. AFAIK, I've cleared the place of bad guys but have not gotten the game message saying to move on that I've done it.

I'm wondering if the problem is I can't open that chest or is it something else or is the game message unneeded? I have killed a few guys but can't find the bodies so am worried that maybe one of the lost was carrying that key or ???

Suggestions?

The Lost Spires has a thorough http://www.lostspires.com/pages/faqs.htm, which answers your key question at least.