Iron Man
Iron Man requires you to reach Wave 10 on Survival or Pure Strategy on Insane difficulty.

Some players have reported that they do not get credit for the achievement unless they let their Eternia Crystal die after wave 10. Earning this achievement unlocks the Horned Crystal Skin.

Related Achievements

  • Iron Man - Reached Survival Wave 10 on Insane Difficulty
  • Survivalist - Reached Survival Wave 15 on >= Medium Difficulty
  • Tough Guy - Reached Survival Wave 15 on >= Hard Difficulty
  • Thick Skin - Reached Survival Wave 20 on >= Medium Difficulty
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