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