Cheat the Hangman is a challenge in Calavera Ruins. It is unlocked by killing all nine Hangmen with a rope. Every room in the Calavera Ruins has a whipping Enemigo with Rope, although the second room also has an unused rope that can be found near the bottom of the level. While three of the hangmen can be found pretty easily (as they're on the main path) the other six can be found near the treasure chests or areas needed to complete Temple Totems.