Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Big Guy	Not so big now, huh?
Big Money	$10,000 is nothing to you.
Defensive	You built a turret.
Little Guy	Too easy.
Wave 10	Making good progress.
Wave 100	Impressive.
Wave 15	Getting old, yet?
Wave 20	The roaring 20's.
Wave 25	A quarter of the way to 100.
Wave 5	So far, so good.
Wave 50	Halfway to 100.