Here is the full list of all 21 Catan Universe achievements.
Win 5 games with the Cities&Knights expansion.
Finish the introductory game of 'The Duel'.
Colonize all islands in the Seafarer scenario "The four islands".
Win a game without building a city.
Reach level 10.
Build 3 city walls in a game of Cities&Knights.
Build a road that is compromised of at least 12 sections (including ships).
Move the pirate 5 times in a game of Seafarer.
Reach level 5.
Reach level 2.
Change your looks with the avatar editor.
Reach karma level 4.
Win a game, where you have both the Longest Road as well as the Largest Army.
Use your first ticket.
Finish the tutorial of the base game.
Reach level 20.
Add your first friend.
Create a guild or join one.
Win 5 games with the Seafarers expansion.
Uncover 10 fog tiles in a game of Seafarer.
Play the progress card 'Wedding' 10 times in your games.