Growth Bonuses...
	Various Steam Achievements...

As you reach various population levels, you'll unlock corresponding township levels, buildings, and bonuses, as indicated below.

Little Hamlet (500)
Elementary School, Medical Clinic, Landfill Site, Taxes, Loans, Garbage, Healthcare, Education.

Worthy Village (1000)
Police Station, Fire House, 2km x 2km area, Districts, Policies, Second Loan, Industry Specializations, Services Policies, Fire Department, Police Department, Unique Buildings, Forestry Specialization, Agriculture Specialization.

Tiny Town (1500)
High School, Decoration, Level 2 Unique Buildings, Pet Ban, Smoking Ban, Parks, Recreation.

Boom Town (2600)
Bus Depot, Advanced Wind, Turbine, Cemetery, 2km x 2km area, Transport, Level 3 Unique Buildings, Bus, Recycle, Recreational Use, Ore Industry Specialization.

Busy Town (5500)
City Planning Policies, Level 4 Unique Buildings, Free Public Transport, Heavy Traffic Ban, Oil Industry Specialization.

Big Town (7500)
Metro Station, University, Incineration Plant, 2km x 2km area, Taxation Policies, Level 5 Unique Buildings, Metro, Education Boost, Tax Raise, Tax Relief, High Density Residential Zone, High Density Commercial Zone, Office Zone.

Small City (11,000)
Train Station, Cargo Train Terminal, Hydro Power Plant, Level 6 Unique Buildings, Train, Small Business Enthusiast, Big Business Benefactor, Industrial Space Planning, High Tech Housing, Highrise Ban.

Grand City (20,000)
Harbor, Cargo Harbor, Third Loan.

Capital City (32,000)
Nuclear Power Plant, 2km x 2km area, Ship.

Colossal City (44,000)
Nuclear Power Plant building, 2km x 2km area.

Metropolis (65,000)
Airport, Airplanes, 2km x 2km area.

Megapolis (80,000)
2km x 2km area, Monuments.

Achievement	How to unlock
A Huge Hadron	Build the Hadron Collider Monument.
Beam Me Up	Build the Space Elevator Monument.
City in Motion	Have 20 transport lines.
City in Motion 2	Have 50 transport lines.
City Planner	Use the district tool to draw 3 districts.
Climbing the Social Ladder	Have a Citizen educated to level 3 from 0.
Decorator	Use the Asset Editor to make your very own asset.
Distroy	Have more than 10 districts with unique policies.
Earthloving City	No water or ground pollution in a city of over 10,000 residents.
Fire Watch	Have 5 Fire Stations.
Frenetic Player	Click on a police building 100 times in a row.
Happy Town	Have more than 95% city happiness for 5 years.
Heavenly City	Unlock Monuments.
Higher Education	Have over 70% of citizens highly educated in a city of over 10,000 people.
I Want It All	Unlock every single building in the game.
Lawmaker	Apply a policy to a district you created.
Make Them Pay	Have both residential tax rates over 5% higher than industry for one year.
Medic!	Build the Medical Center Monument.
Metropolis	Have a population of 100,000 in your city.
New Eden	Build the Eden Project Monument.
Pioneer	Create your very first city.
Power at Your Fingertips	Unlock all city services.
Power to the People	Have the industry tax rate over 5% higher than either residential tax rate for one year.
Professional Dumper	Fill five landfill sites.
Rolling in Dough	Earn 15,000 per week.
Safe City	Keep the crime rate under 10% for 4 years straight.
Short Fuse	Build the Fusion Power Plant Monument.
SIMulated City	Have an area the size of nine map tiles.
Terraformer	Create a map.
The Safest Town	Have 5 Police Headquarters.
Tough City	Have the city survive a crime rate of over 40% for 2 years.
Unpopular Mayor	Have 15% happiness.
Well Informed	Have a look at all the different info-view panels.