2048

Despite being smaller than the Sudoku playing area, 2048's constraints and sense of space give it charm. It feels somewhat barren at first, but you'll be surprised at how fast the squares fill up. It gets to the point where you're always hoping that at least one tile will be available so that you can move about. In a very constrained area where every move has the power to make or break your stride, it's testing your strategic thinking. Attempting to clear a route to triumph is your only option.