Build some bookshelves to improve your enchantment table.

Breed two cows with wheat.

Stop starvation using Rotten Flesh.

Cook and eat a pork chop.

Wear a full suit of Iron armour.

Construct a furnace out of eight cobblestone blocks.

Attack and destroy a monster.

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

Use planks and sticks to make a pickaxe.

Open your inventory.

In Buried, rewrite history.

In Buried, acquire a perk for free.