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