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