Game logic

How the fuck do they code games so that everything moves smoothly and at a consistent rate regardless of the speed of the machine you run it on, and still have tons of shit interacting with each other somehow?
Maybe I need to find a good open-source candidate to have a look at.

Also, I wish I knew the correct terms to describe what I'm talking about.

>>73
Yeah, I somehow got the idea into my head that Sleep()'s resolution was not enough.  Then when I was looking for a solution I realized that it would be fine.