Create and fully power a Beacon.

Spawn the Wither.

Visit all Nether biomes [Bedrock Only]

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

Stop starvation using Rotten Flesh.

Throw diamonds at another player.

Wear a full suit of Iron armour.

Connect three chests to a single furnace using three hoppers. [Bedrock Only]

Catch and cook a fish!

Build some bookshelves to improve your enchantment table.

Construct a Nether Portal.

Play for 100 days.