SimCity is the reinvention of the flagship of city-building simulations. With this game, every choice you make you will see it affecting your city, your region and the world within the game.

Sims with Personality
Yours isn't just any city! It comes complete with a cast of colorful characters. Police Sims catch bank robbers and ambulances drive sick Sims to the hospital. Homeless Sims hang out in the park and the bus driver Sim takes kids to school every day. Listen to the lobbyists and industry leaders as they present opportunities and ask for pledges from you as Mayor, but look out for the arsonist as he tries to start fires and spread chaos! Each character has a role and each is affected by the choices you make and how you play the game!

Intelligent Sims
Each Sim in SimCity is an agent in the GlassBox Simulation Engine. That means they each go to work, purchase items, consume goods and live in a home (unless they're homeless). They actually drive along the roads, get stuck in traffic, and play in the parks. Each of the goods you see them produce is an actual unit within the game, and you can see resources diminish as they are used up. This means the city you see is the actual heart of the simulation. The Sims in your town lead real lives and the choices you make affect their future.

Cities Respond to You
The Sims in SimCity aren't shy about letting you know how you're doing as mayor. Whether you are meeting their basic needs, building them the best parks and schools, or ignoring them completely, you can see the consequences of your actions reflected in the look of your city. Happy Sims might erect a bronze statue in your honor, while disapproval may trigger a protest in front of city hall. Failing to meet the demands of your citizens can cause abandoned homes and graffiti-riddled slums, but improved conditions will bring a string of moving vans as Sims flock back to your town!

Even more on the official Website...

Source: official Website