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