The required challenges are No Towers Allowed, Unlikely Allies, Warping Core, Raining Goblins, Wizardry, Ogre Crush, Zippy Terror, Chicken, Moving Core, Assault, Treasure Hunt, Death From Above, and Monster Fest.
Completing this challenge unlocks the Eternia Crystal skin "Western".
- Weapon Master - Completed No Towers Allowed on Insane difficulty
- Kobold Exterminator - Completed Zippy Terror on Insane difficulty
- Dancing in the Rain - Completed Raining Goblins on Insane difficulty
- Ogre Block Party - Completed Ogre Crush on Insane difficulty
- Gold Blitz - Completed Treasure Hunt on Insane difficulty
- Monster Madness - Completed Death From Above on Insane difficulty