Attack and destroy a monster.

Enter an End Portal.

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

Relieve a Blaze of its rod.

Discover 17 of 40 biomes.

Acquire 30 Emeralds by trading with villagers or mining.

Gain the trust of an Ocelot.

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

Use planks and sticks to make a sword.

Gather all 16 colours of Wool.

Catch and cook a fish!

Create an Iron Golem.

Construct a furnace out of eight cobblestone blocks.