Survived 5 minutes without losing life.

Ring the mysterious bell. What happens after that, is up to you.

Raise a character level to 10.

Escape from Jill's apartment building.

Complete 'Enter, Pursued by a Memory'.

Craft and place a sign.

Acquire 30 Emeralds by trading with villagers or mining.

Throw diamonds at another player.

Build some bookshelves to improve your enchantment table.

Deal nine hearts of damage in a single hit.

Kill the Enderdragon.

Brew a potion.

Destroy a Ghast with a fireball.