Here is the full list of all 24 Airship: Kingdoms Adrift Demo achievements.
Defeat the mysterious ship
Arrived at the Pirnmill Town and talk to the Harbourmaster
Defeat William Walter Wellington for the first time
Sigrun Wilkur came onboard the ship
Read the how-to-play section
Embark on the adventure
Finish the basic combat tutorial
Finish the basic fitting tutorial
Start the game as an Aecerlian Commander
Start the game as a New Viridian Commander
Start the game as a Confederation Commander
Start the game as a Combatant
Start the game as a Logistician
Start the game as an Industrialist
Welcome Rodrigo back onboard
Visit the Silberblum Storehouse and meet Kara Wilkur
Arrived at Crossington Town safely after a decoy job
Earn an Official Assault Evidence
Attack a toll collector
Destroyed 100 ships
Have 100,000 Eagles in your account
Sold 10,000 pieces of item to merchants
Died and sunk to the abyss