I haven't played this yet, although I've heard a lot of good stuff about it. I recently finished Amnesia and had several people recommend that I go through Dark Corners - thankfully I own a copy on Steam so I just need to get the time to play it.

It's worth noting that this game isn't a sandbox RPG like Skyrim, nor was it made by the same developer. However it still sounds like an excellent title, and definitely one worth trying.