Discover a secret alcove.

Reach the underground forest.

Survive the void.

Reach the Elephant Bridge without dying.

Befriend three Ghost Butterflies at once.

End the nightmare.

End the nightmare with 25 Baubles.

Be nice.

End the nightmare without dying.

Earn back 3 chances.

Have attack, jump and health upgraded at the same time.

Make it past the first tier.

Have 3 different critters at the same time.

Find a whacking stick.

End the nightmare on Brutal Mode.