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