Here is the full list of all 22 Townopolis achievements.
Demolish 50 buildings.
Buy 30 licenses.
Build 250 buildings.
Earn 12 silver or gold stars.
Win 12 sandbox scenarios.
Train 100 workers.
Upgrade 100 buildings.
Clear 50 plots.
Build a town with 1,000 residents.
Build 75 buildings.
Demolish 10 buildings.
Reach 100 total happiness.
Upgrade 25 buildings.
Demolish 2 buildings.
Build 10 buildings.
Upgrade 300 buildings.
Earn $100,000,000.
Order 300,000 units of material.
Earn all the gold stars.
Earn 10 trophies.
Earn all the trophies.
Complete the entire campaign.