You've started your first game

You've got your first companion

Craft your first item.

Complete your first building.

Harvest a fully grown crop for the first time.

Eat food for the first time.

Reach the seventh day in a world.

Face your first animal tide.

Board a boat for the first time.

Unlock your first creature entry by observation.

Defeat a boss with your own hands or a companion's help.

Travel to the Moon by rocket for the first time.