Caesar III

                     Taken from the Net

Use this cheat when you get the option of going into the Senate:
Click the Emperor icon in the Senate. Give yourself a wage of 500
denarii (Caesar's wage). After a few months, when you accumulate
about 3000, go to the same screen and press the "Give to city
button". Click the "all" button in the dialog. Then press the
"give" button. Notice, now you don't have any savings at all.
Never mind ;) Press the "Give to city" button again.  WARNING: DO
NOT PRESS THE "ALL" BUTTON AGAIN OR YOU'll GET YOURSELF INTO
TROUBLE!!  The quantity of money to give to the city is the money
you gave before. So you just press "give" button again, and your
savings go in minus, but who cares 'bout them anyway :) So just
keep repeating this and you'll have a fortune.  And yes, don't be
afraid to turn off the Senate screen. You can turn it off, and
return to it later to give yourself more money.
                              - o -