I was annoyed that I purchased Civilization III, and it came with a readme saying that by default it would launch the game with all expansions, but if I wanted

I was annoyed that I purchased Civilization III, and it came with a readme saying that by default it would launch the game with all expansions, but if I wanted to play an earlier, unexpanded version (which I did), I could just go to the install directory and start the earlier .exe. They don't actually package the earlier .exes. You get one choice.