A-Train 
PLATFORM: PC

1. Press CTRL with SHIFT and type: cheater-cheaterwimp This cheat gives $1M plus all the supplies you can store. 

2. You can run the booming metropolis shown in the demo if you do the following: First run the game, then open SYSTEM menu and select the SAVE option. Save the game and then exit. Then run the game again and simply load your saved scenario. That should give you the demo city. 

3. If railway moguldom bores you and you'd rather see some groovy graphics on the ending screen, then, while the game is running, press and hold CTRL and ALT and type: bellybutton.

4. ctrl-shift-petercheatercheaterwimp
and only works 10 or 11 times before you are kicked out of the game. You can reset the cheat counter by saving your city, quitting the game, running it again and reloading your city.
You should buy up lots of real estate before cheating, so as to get the largest amount of building materials possible.

Note: This embezzlement function does not work on some of the earlier versions of the game. Contact Maxis for an upgrade. 

Another way to cheat is by using DEBUG. Save your game and quit A-Train, then type:
DEBUG filename.a_t
E D78C
87
W
Q

Run A-Train and load your city. Your cash has magically increased by $16 million! (Note: Replace "filename" with the name of your savegame.) 

If you want, you can automate the cheat. In your A-Train directory, type: COPY CON $
E D78C
87
W
Q

Then press Ctrl-Z. Next, type:
COPY CON CHEAT.BAT
@ECHO OFF
DEBUG %1.A_T<$

Then press Ctrl-Z. Now, to cheat, just type:
CHEAT filename
where "filename" is the name of your savegame. <Phew!>