This is a selection of courses chosen by the development team, based on the theme of "Tricky Challenges." This selection's focus is simple: courses that are so hard, they made even our most confident staff members weep. But difficulty isn't all we were looking for! These are the kinds of courses that you can't stop coming back to for one more try. It takes a lot of work to make courses with this level of finely tuned suffering! If you're not a hardened Mario veteran, you might find these courses a little too much to handle, but it can't hurt to give them a try!