Editor's note: SomeAwesome is a Humble Partner and the link below is an affiliate link. While the game referenced in this article is indeed free, if you happen to purchase any games on Humble within 24 hours of clicking the link, we are given a small fraction of the price of any game you buy. This does not affect the price you would normally pay on Humble, but it does help us with website hosting, keeping the Minecraft server running and providing more game keys for authors. Thanks!
For the next few days (or while supplies last) you can get Kingdom: Classic on Humble Bundle for free! Just click the link below and follow the instructions to nab yourself a copy. If you're into city building / resource management games then this might be right up your alley.