The Challenge 1.0 - 1.8.x is a release file of the Minecraft map The Challenge, made for Minecraft 1.8.7, 1.8.4, 1.8.3, 1.8.6, 1.8, 1.8.2, 1.8.5, 1.8.1. It was published on April 11, 2016 and is 0.3 MB in size. For the full description, screenshots and every other version, visit the The Challenge map page.
How to install: Extract the .zip and move the world folder into .minecraft/saves; the map then appears in your Singleplayer list.