Here is the full list of all 29 URBO achievements.
Build a town in each URBO surroundings
Unlock all sets of buildings
First activation of the tower
Reach 100 000 population in all surroundings in total
Build 20 buildings of level 8 in all surroundings in total
First entry to photomode
Make 20 x3 combos
Reach 50 000 population in all surroundings in total
First 4x combo of merges
Make 10 x3 combos
First merge of 9 buildings
Discover all islands at any multi-island surroundings
Unlock ARCHIPELAGO
Unlock all surroundings
Build 10 buildings of level 8 in all surroundings in total
Make 5 x3 combos
Build 5 buildings of level 8 in all surroundings in total
Reach 20 000 population in all surroundings in total
First ship voyage
Get 21 sets of cards in total
Unlock VALLEY
Unlock WATERFALL
First 8 level building
First 6 level building
Reach 5 000 population in all surroundings in total
First 7 level building
First island completed
First 5 level building
First building built