Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Are you still counting those white balls?	Collect 1000 Quasars.
Boss fighter!	Kill any boss
Don't mess with the gravity too much.	Use force field ability 50 times.
Gotta collect them all!	Unlock all ships.
Hidden stuff is the best stuff.	Unlock bonus levels
Only the big flies count!	Kill all bosses on diamond difficulty.
Stop pulling stuff!	Use energy collection ability 50 times.
Upgrade master!	Spend 50 upgrade points.
You're a hard nut to crack?	Use shield ability 50 times.