Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Crystal Prospector	Destroy 20 crystals in the Crystal Rush game mode.
Crystalor, not Chris Taylor	Complete the Crystalor Challenge.
Darkness Awaits	Defeat a single dark knight in the Dark Knights Army challenge.
Exterminator	Kill 7 persons in a row to obtain an Extermination.
Grim Reaper	Accumulate a total of 1000 kills.
Hula Hooprang	Swing a single boomerang around for 5 seconds.
Laser Trio	Kill 3 knights in a single laser shot.
Master Excavator	Destroy a total of 5000 walls.
Nest Exterminator	Complete the Lightning Rampage challenge.
Playing with Fire	Complete the Dragon Alert challenge.
Ride the Rainbow	Ride a unicorn by stacking 2 horse power ups (Secret)
Running at Crazy Speeds	Stack the boots power up to max level (3)
Trolling the trolls	Complete the Attack of the trolls challenge.
True Master	Possess 8 minions at once.
Vanquisher of worms	Complete the Worms Attack challenge.