Wear a full suit of Iron armour.

Bake a cake using wheat, sugar, milk and eggs!

Brew a potion.

Complete Chapter 4

Join the Golden Path (Campaign only).

Chapter 3: Destroy 4 stone Chompy heads

Defeat 100 enemies in Kaos Mode

Complete a captured Villain's quest

Unlock your first Elemental area

Construct one type of each tool (one pickaxe, one spade, one axe and one hoe).

Use planks and sticks to make a hoe.

Catch and cook a fish!

Use a saddle to ride a pig, then have the pig get hurt from fall damage while riding it.