Complete the following tasks to unlock the corresponding achievement. To view your achievements and stats in Steam, select "Community", then "My profile", then "View all my games", then the game and view stats.
A Tale of Two Endings: Watch both game endings.
A True Hero: Reach level 20.
Death of a Penguin: Kill the Evil Nun.
Dispenser of Justice: Kill 3000 Enemies.
Frozen Justice: Kill the Taking Tree.
Konichiwa: Learn to Speak Japanese.
Mystic Transport: Discover all 44 Teleporting Outhouses.
Orque Impostor: Convince an Orque Guard you are an Orque.
Primp V.I.P.: See all 20 of Madame Primp's Outfits.
Raise Your Mast: Go Sailing in a Pirate Ship.
Ruin Christmas: Kill Santa Claus.
To Serve Man: Kill wortten.
Well Educated: Get an Engineering Degree.
Uncharted islands
Complete the indicated task to access the corresponding uncharted island.
Cliche Island: Collect the five pieces of Captain Taint's map. Start the quest to help him get his treasure. He tells you it is on Cliche Island and that a Mutinous Captain may have it. You can also find Mutinous Pirates with the captain on X Island. Just west of X island is Chicken Island, which has the parrot feather required for a different quest. Start at the dock at Chicken Island, then move straight west until you see a small island slightly to the north. Dock there to find Cliche Island and a treasure chest.
Hot Island: Move south from the western side of Spider Island.
Skull Island: After invading the North Pole, get on your ship and travel south from the dock. Look for a few rocks sticking out of the water and a spear with a skull on it.