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