Erase all saved games:
Press L + R + Select.

More maps:
Start with a new city, select any landscape, and wait at least ten seconds. Enter the total screen. Exit the total screen, enter the save/load menu, then select the "No" option. Return to the main menu, select the "Start New City" option, and the landscape will change. This effectively doubles the amount of maps.

Maximum money:
Turn off your auto budget and spend all of your money. Set all of your tax and funding levels to 0%. When the annual tax screen appears hold L, select "Go with figures", and the regular screen will return. While continuing to hold L, press X(2) to skip to January. Choose the tax option from the menu and raise all of your funding levels back to 100%. Leave the tax level at 0%. Select "Go with figures" and proceed to the main screen. Release L and your funds should now show all 9s.

Easy money:
Start a new city. Build a power plant, 8 residential zones, 4 commercial zones, 4 industrial zones, and (preferably) a police department. You can build more than that if desired, but keep your city small so the game will not slow down as a result of having a large number of buildings). Leave the game running overnight, then check the game. You should have a lot of money and many years should have passed. You will also have the fountain, which raises land values.

Hint: Bonus casinos and amusement parks:
Choose a landscape that is not an island, but has a large amount of water. There should be a body of water towards the middle of the landscape. Create roads in a way to form a cross near the middle of the landscape, near the water. The roads must continue until reaching the edge of the map. Two to five casinos or amusement parks may now be built.

Hint: Getting different gifts:

The Zoo appears after one to three Stadiums are built. Build the Zoos near Residential or Commercial zones for the greatest effect or population increase.

The Bank appears after less than $2,000 is available.

The Fire HQ appears when six, twelve, or eighteen Fire Stations are built.

The Police HQ appears when six, twelve, or eighteen Police Stations are built.

The Train Station is available after building 50 and 200 kilometers of track. Build these near Commercial zones.

The Fountain appears after the city is 50 years old. Build it near Commercial Zones.

Landfills appear when your open land is only 150,100, 50, and 30 acres.

A Library appears when 3, 6, and 9 Schools are present.

A Windmill appears when you have 150 Developed Zones.

A Mario Statue appears when the population reaches 500,000.

Your home appears after the population reaches 2,000. Build near Residential Zones.

City Parks are available after 300, 600, and 900 acres of Parks are built. Place near Commercial Zones.

An Expo is available after the population reaches 50,000 people and an Airport is present. Put near the Industrial Zones.

The View Model is available after the population reaches 50,000 people.

The Amusement Park and Casino are available after 300, 400, and 500 Kilometers of roads are built. Place near Residential Zones.

Hint: Topping Residential and Commercial zone buildings:
To get buildings to top off you need to have the zones touch. Place parks and gifts near them to get to this point faster. Once the two squares reach the highest level of growth, they form to make a top. Industrial zones cannot top off.

Hint: Home evolution:
When you receive a house as a gift, place it near the Residential Zones or any other desired location. After the town grows into a city, then to a capital, metropolis, and megalopolis, your house will also grow with home extensions. The town stage house is a small house, which resembles an upside down "L". It also has a few bushes and trees in the front yard. The city stage house is a two level red house. It also has trees and bushes. The capital stage house is completely different. It turns gray and has two levels. It is also larger, has a patio table, a pool in the front yard, and a satellite dish. The metropolis stage house is also gray and seems to have something resembling another pool on the roof. It also still has trees and landscaping and is bordered by a fence.

Hint: Depression:
When commercial zones start to go undeveloped, your city is in a depression. To fix this problem, just build more industrial and residential zones. The population will increase, forcing the commercial zones to redevelop.

Hint:: Benefits of an Airport/Seaport without the plane/ship crashes:
Use the following trick to have an airport or seaport that benefits your commercial and industrial zones but does not have plane or ship crashes that seem to occur at the worse locations. Build the airport/seaport and do not supply any roads/rails/power to the zone. Normally, a zone will not develop without power. But since airports/seaports do not need to develop, they do not need the power. This stops them from being "turned on" and therefore, do not produce ships/airplanes but will still acts if the were.

Glitch: Loans with no bank:
Get the bank and place it anywhere. Wait a year, then destroy it. After you destroy it, you will still be able to take out loans from the bank option in the menu.