Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Completionist	Finish level 1.
Completionist	Finish level 2.
Completionist	Finish level 3.
Completionist	Finish level 4.
Completionist	Finish level 5.
Completionist	Finish level 6.
Completionist	Finish level 7.
Completionist	Finish level 8.
Completionist	Finish level 9.
Completionist	Finish level 10.
Completionist	Finish level 11.
Completionist	Finish level 12.
Completionist	Finish level 13.
Completionist	Finish level 14.
Completionist	Finish level 15.
Completionist	Finish level 16.
Completionist	Finish level 17.
Completionist	Finish level 18.
Completionist	Finish level 19.
Completionist	Finish level 20.