Press CTRL + ALT + SHIFT + C Then type the following into  the dialog box that appears:

• i am weak - Everything is free!
• i love red tape - Sets year back to 1900
• pay tribute to your king - All reward and opportunity buildings
• power to the masses - All power plants, regardless of the year
• water in the desert - All water structures, regardless of the year
• garbage in, garbage out - All garbage structures, regardless of the year
• let's make a deal - Neighbors will attempt to make deals
• call cousin vinnie - Donation offer from Vinnie
• (use above code, decline offer, and type) zyxwvu - Get the SimCastle Reward
• nerdz rool - All industry becomes high-tech
• salt on - Change the sea to salt water
• salt off - Change the sea to fresh water
• terrain one up - Raises the terrain by one (will destroy buildings!)
• terrain one down - Lowers the terrain by one (will destroy buildings!)
• terrain ten up - Raises the terrain by ten
• terrain ten down - Lowers the terrain by ten
• the birds - A flock of birds flies over your city
   
• To add every building in the game to the landmarks window (and remove the 10-landmark limit):
   
• 1. Open the Power Plant window (under utilities Menu), and then close it with the X button.
  2. Then goto and open the Rewards & Opportunities window (under civic & special menu) and then close it with the X button.
  3. Go back to the utilities menu and open the Garbage Disposal window and then close it with the X button.
  4. Now finally, go back to the civic & special buildings menu and open the landmarks window. You should notice that the list of landmarks has grown considerably.
  
  This code makes all of the structures in the game availible to place at your free will (and at free cost) anywhere on your city map. All structures are including, even abandoned and burdown buildings, as well as filler tiles. Also, the quantity restraints have been lifted, so you can place as many landmarks or structures as you want. You can also place duplicate landmarks or structures.
  
  To use technologies before they are invented:
  You can use the keyboard shortcuts to access new technologies before they are invented. The full list is on the reference card packaged with SimCity, and a partial list can be found here, although the only useful shortcut on this list is the train tracks.
  
   
• Free Water Bug
  
  Start your game and only build one building, then run a from this building and connect it to the nearest neighbor. When the city's mayor offers a deal, take it regardless of price. Now, wait till the end of the month and use the "terrain ten up" or "terrain one up" cheats (see above -- these cheats will destroy all structures in your city). The connection will be destroyed as far as paying for the water goes, but when you rebuild the connection at that tile, you will be getting water for free.
  
   
• The following are for forcing advice, their effect is unknown:
                     
• stop forcing advice - unknown
• force mortimer to say - unknown
• force moe to say - unknown
• constance to say - unknown
• force maria to say - unknown
• randall to say - unknown
• force gus to say - unknown
• force karen to say - unknown
• force petitioners to say - unknown
  
   
• The following are all messages that appear in the news ticker:
   
• broccoli - "Sorry, Money Doesn't Grow On Broccoli"
• bat - "Da Da Da Da Da Da Da Da Da BAT-man!"
• scurk - "If You Build It, They Will Come"
• llama - "The Llama Is A Quadruped"
• easter egg - "Duo Ragazzi's Easter Egg Palace: Old World Charm In A Post Modern Setting"
• sim - "If You Lived Here, You'd Be A Sim"
• help - "Dozens Of Hidden News Ticker Reveals; Sims Encouraged To Collect Them All And Amaze Friends"
• erts - "Investment Tip: Buy Low, Sell High" (erts is the NYSE listing for Electronic Arts)
• will wright - "What Will He Think Of Next?"
• electronic arts - Not Just Sports Games Anymore"
• ticker - "(Name of City) Picayune: The Finest In Scrolling Entertainment"
• money - "Money Does NOT Grow On Trees, Study Concludes"
• simcity - "Keep Trying And Maybe You'll Figure It Out"
• hello - "Greetings Mayor, Your Sims Salute You"
• mayor - "Mayor (Name of Mayor) brings (Name of City) To News Ticker Highlight"
• sc3k - "Mayor Suspected Of Attempting Embezzlement; Ends In Failure" (haha,you cheater =)
• 1234 - "Secret Number Combination Causes Announcement In News Ticker"
• maxis - "Did you know that MAXIS spelled backwards is SIX AM?"
• moremoney - "MOREMONEY Not Cheat Code, Research Concludes"
• advisor - "Mayor Under Investigation For Possible Embezzlement"
• fund - "FUND Not A Cheat Code, Do Not Type MOREMONEY, It Is Not A Cheat Code Either"
   
• Trainers:
  
  Trainer 1 - Gives the city 9,223,372,036,854,775,807 simoleons