They can be from any medium: Steam, a website etc.
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Until Dec 16th I believe. [url=http://www.escapistmagazine.com/news/view/121038-Metro-2033-Goes-Free-on-Facebook]Can get a free key by following Metro2033 on facebook.[/url] [quote][b]Posted by:[/b] Dropship dude Metro 2033. Not sure how long it'll be free for, or if it's just free forever now, but its free.[/quote]