Dealnews has the story on these 2 free PC games:
"Amazon offers Stronghold HD for Windows (pictured) for free when you download Stronghold Kingdoms for Windows, also free. (You must first purchase and download Stronghold Kingdoms; proceed to cart with Stronghold HD then to see it for free.) That's a saving of $6 and the best offer we could find for either game. Offer ends February 5."