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