Defeated all bosses.

Caught a fish with Mjolnir.

Rice field expanded to maximum.

Captured all of the Sea People murals.

Fed cat 20 times.

Sold 200 items at workshop.

Wear a full suit of Iron armour.

Cook and eat a pork chop.

Build some bookshelves to improve your enchantment table.

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

Harvest some leather.

Smelt an iron ingot.

Construct a furnace out of eight cobblestone blocks.