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A Challenger Approaches
A Challenger Approaches is awarded for completing all Challenges on Insane difficulty (Medium difficulty for Mobile versions).

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".

Related Achievements

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