Defeated Abaddon.

Throw diamonds at another player.

Brew a potion.

Visit all Nether biomes [Bedrock Only]

Equip one 4-Star or above weapon.

Mine 1,728 Cobblestone and place it in a chest.

Relieve a Blaze of its rod.

Dye your bed a different color.

Use a Grindstone to get experience from an enchanted item.

Craft and place a sign.

Teleport over 100 meters from a single throw of an Ender Pearl.

Acquire diamonds with your iron tools.

Smelt an iron ingot.