if you can download the game from steam, and get a CD key to play the game on or offline, what's to stop people from putting it into a zip file along with a CD key and loading it onto kazaa or winmx? i understand you won't be able to play it online, or get the tools to build your own levels (i think). Can anyone stop this? I prefer going legit and buying my games, Valve deserves it as other people who put time and effort into making these games, but I get ticked if I just bought HL2 for 50 bucks while my neighbor just gets his cable modem and downloads it in one night off of kazaa.