Hello, this is something different Content in my pc game "Babylon's Tower". It's another game mode like a Training, where you can upgrade your skills, that you can use in a main game. There will be many Training challenges and some of them will be locked. To unlock them, you have to beat other challenges. The best Thing is that you are not forced to Play main game to unlock the first serie of challenges. But in a main game you will be able to open extra challenges.