This is not making a brand new game, but I am basically making Uncharted 2, but more like Indiana Jones
The idea is that the game is set in a small US town, and people there give you clues and you hear rumour about possible locations of treasure, so then you go to a town near the location. From there, you do favours for the locals etc, to get hints where the place might be, and you could also just randomly explore the jungle or whatever environment is around the town. Once you get a general area, you have to go there are then look around for ruins before searching them. Of course there will be rival treasure hunters and there will be several extra scenes, many of which involve running away, or maybe 1 or 2 special levels where you have to steal your treasure back if it has been taken.
