Cities: Skylines is an extremely fun city building and management game. For those who haven't had a chance to add it to their library, or want more of the DLC, well now is the time to get it. The Humble Cities: Skylines bundle has both the base game and a majority fo the DLC for a heavily reduced price.
For just $1 on the Humble Store, you can get Cities: Skylines and its Deep Focus Radio DLC. If you pay the "average price" and you’ll not only get the base game, but also the Snowfall and Natural Disasters expansions, along with the Concerts and High-Tech Buildings DLC. Pay $18, and you will get Mass Transit, Green Cities, Industries, and Campus expansions, plus Art Deco and European Suburbia DLC.
If you purchase the full package, you will have six of the nine major expansions for Cities: Skylines, along with some of the smaller DLC's, at an extremely good price. The bundle will come in the form of Steam keys that you can redeem at your leisure.