One of the achievements in Infinity Blade is Waste Not Want Not. The description for it is "find all world treasures in a play through." After you get the first treasure, though, you have to choose from a fork: either go through the front door or go into the basement dungeon. Both paths have treasures, but you can't play both paths---can you? How is it possible to attain this achievement?
The achievement only applies to the original game: the path into the basement dungeon is for Content Pack #2. So to complete Waste Not Want Not, go through the front door.
It should be noted that you need to find more than just treasure chests: to complete the achievement, you need to collect money bags and potions, as well.