Here is the full list of all 22 Megapolis achievements.
Earn all the gold stars.
Complete the entire campaign.
Earn all the trophies.
Build a zone with 5,000 residents.
Earn $100,000,000.
Order 150,000 units of material.
Win 12 sandbox scenarios.
Upgrade 300 buildings.
Buy 20 licenses.
Earn 12 trophies.
Demolish 100 buildings.
Upgrade 100 buildings.
Build 250 buildings.
Earn 12 gold stars.
Clear 75 plots.
Upgrade 25 buildings.
Train 100 workers.
Reach 25 total happiness.
Demolish 25 buildings.
Build 75 buildings.
Demolish 5 buildings.
Build 10 buildings.