Complete the indicated task to unlock the achievement.

Achievement	How to unlock
All Stars on Deadly	Get three stars on every level on deadly difficulty.
All Stars on Easy	Get three stars on every level on easy difficulty (or harder).
All Stars on Hard	Get three stars on every level on hard difficulty (or harder).
All Stars on Normal	Get three stars on every level on normal difficulty (or harder).
All Stars on Very Easy	Get three stars on every level on very easy difficulty (or harder).
Basking Shark World Complete	Complete all the main basking shark levels on any difficulty.
Bee World Complete	Complete all the main bee levels on any difficulty.
Cat World Complete	Complete all the main cat levels on any difficulty.
Dingo World Complete	Complete all the main dingo levels on any difficulty.
Grey Goo World Complete	Complete all the main grey goo levels on any difficulty.
Octopus World Complete	Complete all the main octopus levels on any difficulty.
Penguin World Complete	Complete all the main penguin levels on any difficulty.
Rat World Complete	Complete all the main rat levels on any difficulty.