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