This is a game I found while looking at some reviews. To me, it seems like some kind of mix between GTA, Indiana Jones and some game like Nethack.
It is recently out of beta I think and is very addictive.
You collect treasures from 4 different areas that have a randomly generated map every time you play. It includes bosses as well as a whole lot of ways to die.
Try if you haven't and talk about what you like/dislike or what you would want in the game.