Challenge runs that will make your favorite games difficult and enjoyable again

Minecraft Skyblock challenge

The concept of this challenge is deceptively simple, and yet it is very difficult to complete. You start on a floating island with limited resources, and your goal is to complete the challenges given to you with those resources or run out of them while trying. There are three base rules, stating that you may not jump off the island to regenerate health, you may not build a bridge to the mainland, and you must play on at least easy difficulty.

Survival maps are pretty common, but this one I have seen stump even some of the most creative problem solvers.