Here is the full list of all 22 Romopolis achievements.
Reach 25 total happiness.
Earn all the trophies.
Complete the entire campaign.
Earn all the medals.
Win 12 sandbox scenarios.
Build a city with 2,000 residents.
Earn 2,000,000 Dn.
Demolish 50 buildings.
Buy 20 concessions.
Train 120 workers.
Earn 12 medals.
Upgrade 300 buildings.
Earn 12 trophies.
Build 250 buildings.
Order 25,000 units of wood and stone.
Upgrade 100 buildings.
Clear 50 plots.
Build 75 buildings.
Demolish 10 buildings.
Upgrade 25 buildings.
Demolish 2 buildings.
Build 10 buildings.