At the moment, there are no Steam achievements for this game. However, there are achievements available in-game. These are really just for your own enjoyment!

Let me know if you have any questions!

Time to make an omelet

Find at least one out of three easter eggs.

If you need help finding the easter eggs, check my guide here.

Lots of time on your hands, eh?

Listen to all 7 of the messages on the answering machine in Magnus’s cabin without skipping.

Nice job on the GameFAQs usage!

Finish the game on Master Sleuth difficulty. Or, if you play on Amateur Sleuth difficulty, get through the entire game without using any of the hints on the task list.

Row, row, row your boat...

Take the dinghy to the lighthouse at least 20 times.

Put a little love in your heart!

After Ned says, "I love you", say, "I love you, too."

It only took you a month to solve the case!

Go upstairs to the lodging area of the Missti Skip at least 14 times.

Compulsive spender or completionist? You decide!

Buy one of every item in the gift shop. There are a total of 19 items available for purchase.

Turning cute animals into entrees like a pro!

Correctly complete at least 15 food orders in the Missti Skip Pub.

Þú ert Frábæ!

In the Missti Skip Pub, play the Icelandic vocabulary game at least 11 times (44 rounds).

Intentional, or just bad at mazes?

Explore every room in the ice caves. You won't be able to accomplish this until you reach the end of the game, which is when you gain access to the last few areas in the caves.

Not afraid of heights

Climb up to the crow’s nest on the ship at least 11 times.

You DO Know Jack!

At the end of the game, you will see a trivia question just before the in-game awards and credits. Provide the correct response to the question.

Tips
Once the trivia question appears, make sure to save your game. This will preserve the question, allowing you to reload the save file and make another attempt if you answer it incorrectly.

Or you can use a spoiler below:
What was Gunnar's daughter's name? Edda
The ship's figurehead is of what object? A lion
Which was not one of the waterfront shops? The Heart of Odin
What was hanging over the door in the Captain's quarters? A pair of swords
What was the name of the Heerlijkheid's original captain? John
When did the Vikings arrive in Iceland? 9th century
The Icelandic word for volcano is: Eldfjall
Which item was not available in the gift shop? Keychain