Real World sucks! Go WOK.
No classes, you are what you are doing, like in the real life.
Modern and Medieval at the same time.
At the same time, because people have lost everything, they have forgotten most of the modern things, and are like in the medieval times. The radiations have created many mutants that are exactly the same as in the fantasy worlds of Tolkien.
You can fight Orcs with an AK-47.