Board Thread:News and Announcements/@comment-26235098-20150422225500/@comment-26235098-20150423161026

CC-8589934592 wrote: What levels are available to play the challenge? The only indication I had of the challenge being active was that the levels are evidenced on the map. The challenge levels are depicted with a raised platform icon, bearing a "C", like this:

This icon is animated, too. It rises and falls, like it is going in and out of the ground, in the map. Visually you can't  miss them. There were 2-4 levels from each episode, except for the very first two in the game. If your map does not show any levels in this way, then the challenge is not active.