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