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