Play for 100 days.

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

Brew a potion.

Construct a Dispenser.

Use a Grindstone to get experience from an enchanted item.

Trade for the best possible price.

View "Eternal Calm"

Use the Totem of Undying to cheat death.

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

Construct an Enchantment Table.

Complete a Sphere Grid for one character

Destroy a Ghast with a fireball.

Defeat an Evoker.