Here is the full list of all 22 Townopolis achievements.
Build 10 buildings.
Build 75 buildings.
Build 250 buildings.
Upgrade 25 buildings.
Upgrade 100 buildings.
Upgrade 300 buildings.
Demolish 2 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.