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