Cut a few bullets in a row using a bladed weapon.

Throw 100 objects.

Kill an enemy while not looking at him.

Destroy a Ghast with a fireball.

Catch and cook a fish!

Cook and eat a pork chop.

Relieve a Blaze of its rod.

Discover 17 of 40 biomes.

Smelt an iron ingot.

Construct a furnace out of eight cobblestone blocks.

Harvest some leather.

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

Use planks and sticks to make a pickaxe.