B.A.R.T. 1999

SimCity 3000

Press Ctrl+Alt+Shift+C to bring up the cheat window. Now type in these codes and press Enter to activate:

Code:                           Effect:
i am weak                       Everything is free.
call cousin Vinnie              In 'Meet' window, you'll be offered some cash.
zyxwvu                          Use the above cheat, but decline the cash. 
                                Then enter this cheat to get the Sim City Castle.
garbage in, garbage out         All garbage buildings available. 
power to the masses             All power plants available.
water in the desert             All water plants available.
nerdz rool                      All industry becomes High Tech.
pay tribute to your king        Gives all rewards.
salt on                         Makes all water salty.
salt off                        Makes all water fresh.
I love red tape                 Description of city hall becomes "miles and miles of red tape" 
                                Also takes you back to 1900
let's make a deal               All of the connected petitioniers start making deals with you
ufo swarm                       Set 'Disaster' to UFO for tons of UFOs
the birds                       Flock of birds flies over city 
stop forcing advice             Makes Advisors stop advising 
force mortimer to say (XXXX)    Mortimer will say (XXXX)
force gus to say (XXXX)         Gus will say (XXXX)
force constance to say (XXXX)   Constance will say (XXXX)
force karen to say  (XXXX)      Karen will say (XXXX)
force randall to say (XXXX)     Randall will say (XXXX)

The following codes should be entered the same way as above. They prompt different message on the screen.

broccoli
porntipsguzzardo
bat
scurk
llama
easter egg
sim
help
will wright
erts
electronic arts
ticker
money
simcity
simon says
hello
mayor
sc3k
1234
maxis
moremoney
advisor

Add every building to the Landmarks window (and remove the 10-landmark limit):

Open the Power Plant window (under Utilities Menu), and then close it with the X button in the top right corner.
Now open the Rewards & Opportunities window (under Civic & Special menu), and then close it with the X button.
Go back to the Utilities menu and open the Garbage Disposal window, and then close it with the X button.
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 available to place at your free will (and at free cost) anywhere on your city map. 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.