Kill at least 5 opponents in under 10 seconds.

Complete the subplot involving Keira Metz.

Wear a full suit of Iron armour.

Play for 100 days.

Learn 12 potion formulae.

Turn wheat into bread.

Brew a potion.

Build some bookshelves to improve your enchantment table.

Throw diamonds at another player.

Smelt an iron ingot.

Acquire diamonds with your iron tools.

Harvest some leather.

Construct one type of each tool (one pickaxe, one spade, one axe and one hoe).