Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Absolutely knock down	Defeated monster twenty times.
Again and again	Completed the rebirth six times.
Attractive green	Destroyed cactus fourty times.
Cactus Sweeper	Destroyed cactus sixty times.
Despair	Could not save the Earth.
Grown-up	Completed the rebirth three times.
Guardian	Defeated monster thirty times.
I'm sorry	Destroyed cactus.
Never lose	Defeated monster ten times.
No offense	Destroyed cactus twenty times.
Saviour	Saved the Earth.
Started rebirth	Completed your first rebirth.
Tumblist	Completed the rebirth ten times.
Who is this guy?	Defeated the monster.