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