All Buildings
 

Open and close the Power Plants menu 
Open and close the Rewards & Opportunities menu 
Open and close the Garbage Disposal menu 
Open the Landmarks menu 
When you open the Landmarks menu, you'll find that ALL the buildings in SimCity 3000 are now available.
All garbage buildings are available
Press [Ctrl] + [Shift] + [Alt] + C during game. Then type “garbage in, garbage out” in the console window. 

All ordinances are available
Press [Ctrl] + [Shift] + [Alt] + C during game. Then type “i love red tape” in the console window. 

All power plants are available
Press [Ctrl] + [Shift] + [Alt] + C during game. Then type “power to the masses” in the console window. 

All water buildings are available
Press [Ctrl] + [Shift] + [Alt] + C during game. Then type “water in the desert” in the console window. 

Birds fly around city
Press [Ctrl] + [Shift] + [Alt] + C during game. Then type “the birds” in the console window. 

Change fresh water into salt water
Press [Ctrl] + [Shift] + [Alt] + C during game. Then type “salt on” in the console window. 

Change salt water to into fresh water
Press [Ctrl] + [Shift] + [Alt] + C during game. Then type “salt off” in the console window. 

Display message
Press [Ctrl] + [Shift] + [Alt] + C during game. Then enter one of the cheats below in the console window.
 

porntipsguzzardo - "Aha! We Have a Real Pro Here! Try BROCCOLI" 
broccoli - "Sorry, Money Doesn't Grown On Broccoli" 
bat - "Da Da Da Da Da Da Da Da Da BAT-man!" 
scurk - "If You Build It, They Will Come" 
llama - "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" 
will wright - "What Will He Think Of Next?" 
erts - "Investment Tip: Buy Low, Sell High" 
electronic arts - "Not Just Sports Games Anymore" 
ticker - "[city name] 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 [mayor name] brings [city name] To News Ticker Highlight" 
sc3k - "Mayor Suspected Of Attempting Embezzlement; Ends In Failure" 
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" message 
advisor - "Mayor Under Investigation For Possible Embezzlement"
Everything is free - except bulldozing and budget
Press [Ctrl] + [Shift] + [Alt] + C during game. Then type “i am weak” in the console window. 

Get all rewards and opportunities
Press [Ctrl] + [Shift] + [Alt] + C during game. Then type “Pay tribute to your king” in the console window. 

Get the Simoleans
Press [Ctrl] + [Shift] + [Alt] + C during game. Then type “fund” in the console window. 

Load grayscale picture as terrain
Press [Ctrl] + [Shift] + [Alt] + C during game. Then type “load terrain” in the console window. 

Make a deal with a neighbor
Press [Ctrl] + [Shift] + [Alt] + C during game. Then type “lets make a deal” in the console window. 

Make city terrain fall one tile
Press [Ctrl] + [Shift] + [Alt] + C during game. Then type “terrain one down” in the console window. 

Make city terrain fall ten tiles
Press [Ctrl] + [Shift] + [Alt] + C during game. Then type “terrain ten down” in the console window. 

Make city terrain rise one tile
Press [Ctrl] + [Shift] + [Alt] + C during game. Then type “terrain one up” in the console window. 

Make city terrain rise ten tiles
Press [Ctrl] + [Shift] + [Alt] + C during game. Then type “terrain ten up” in the console window. 

Receive a SimCastle to place in your city
Enable “A new petitioner offers $250,000 donation” cheat and refuse Cousin Vinnie’s offer. Then press [Ctrl] + [Shift] + 
[Alt] + C during game and type “zyxwvu” in the console window. 

Secret Messages
Use the command, shift, alt and c key at the same time. Then type one of the following: 

simant 
simmars 
simcopter 
simcity 
simearth 
Broccoli Education Foundation 
Simon says...
Press [Ctrl] + [Shift] + [Alt] + C during game. Then type “simon says string” in the console window, where string is 
the message you wish to appear on the news ticker. 

Stop advisors from giving you advice
Press [Ctrl] + [Shift] + [Alt] + C during game. Then type “stop forcing advice” in the console window. 

Transform a low-tech industry into a high-tech one
Press [Ctrl] + [Shift] + [Alt] + C during game. Then type “nerdz rool” in the console window. 

UFOs terrorize city
Press [Ctrl] + [Shift] + [Alt] + C during game. Then type “UFO Swarm” in the console window. (Note: To 
enable cheat, set “Disaster” to “UFO”.)