No, there was definitely something resembling cheat codes. In Civ4 you could open the ini file, replace a certain line with the word "chipotle", and it allowed you to open a chead-code-like console in-game. I don't know everything it could do, but one thing I used it for was to remove myself from the game and watch the other AI players play by themselves. Don't know if that's "cheating", thought.