Here is the full list of all 11 Whitevale Defender achievements.
Beat easy difficulty while taking zero castle damage.
Beat medium difficulty while taking zero castle damage.
Beat hard difficulty while taking zero castle damage.
Defeat the final boss on easy difficulty.
Defeat the final boss on medium difficulty.
Defeat the final boss on hard difficulty.
Use your crowns to unlock the Stasis, Repair, & Explosive tools.
Use your crowns to unlock the Surge, Mining Drill, & Bomber defenses.
Use your crowns to unlock all 8 blessings.
Complete all 3 difficulties, unlock all tools, unlock all defenses, & unlock all blessings to 100% complete the game.
Destroy all of the enemies on the title screen by playing around.