This guy needs to get off of his freeware soapbox. So...having nonfree games on your free operating system supposedly "sullies" it?
Yes, let's just run those shitty "free" games you linked and play a bunch of crap for the next ten years so we can be hipster elitist idiots like you.
I'd love to dump windows and would love to run Linux. If Valve starts putting games on it, chances are good I'll download it and give it a try. This ADDS people to your elitist club, mr hipster. There is no downside to this.