Break your first boulder.
Defeat 5 monsters.
Defeat 10 monsters.
Make it through day one.
Enter the cave for the first time.
Reach the beach for the first time.
Take down your first tree for usable wood.
Cook a real meal over an open flame.
Set up a furnace and get the heat going.
Build a campfire to light up the night.
Craft a spike for defense.
Earn your first level-up.
Pick up your first coin.
Defeat your first monster.