The 1.4.1 Title update for Terraria has 15 achievements.
You were so preoccupied with whether or not you could open the chest that you didn't stop to think if you should.
Trick a gnome into turning into stone!
Fly a kite on a windy day.
Enter a misty graveyard filled with the surly dead.
Defeat the Dreadnautilus, murderous mollusk lurking beneath the surface of the sanguine seas.
What you're celebrating doesn't matter, just throw a party already!
Defeat the Empress of Light, responsible for all those flashy lights and glitter.
Deliver headpats to the town pet.
Repel the strongest forces the Old One's Army can muster.
Drop a lure in a pool of lava for a pre-fried haul!
Defeat Queen Slime, giving the coup-de-grace to the sovereign of all that jiggles.
Encounter a fairy.
Meet with a tenant who's as happy as they possibly can be!
Obtain the Zenith, the culmination of a journey forged into the ultimate sword.
Obtain the Terraspark Boots, forged from the finest boots of fire and ice.