Again with big thanks to Brjánn Sigurgeirsson from Image & Form, I am now giving away 9 keys for the awesome Outsider DLC for the game SteamWorld Heist.
In it you "command a steam-driven pirate crew in a series of epic tactical shootouts". Also, hats!

Key features:

* Strategy focused on skill rather than chance  
* 15-20 hours of playtime, followed by New Game+  
* Kind to newcomers, deep and challenging for veterans  
* Soundtrack by Steam Powered Giraffe  
* Leveling units and learning new abilities  
* Lots of loot and equipment  
* Procedurally generated levels  
* *New character!
* *New missions!
* *New weapons and other equipment!
* *New hats!

You should also follow @imageform on Twitter, those guys are awesome!

External Links:

Launch trailer
Facebook
Twitter
Website
Youtube
Steam Store Page