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