If you haven't already bought the Castle Crashers DLC King Pack released in January, then you now have a chance to get it for free! Two chances!
Last week, The Behemoth created a Twitter account for all to follow, and Tuesday they gave a heads-up on free King Pack codes. Yesterday, they posted two methods to their developer blog; this morning, our own animerion tipped us via the Co-Optimus forums.
Follow the links to animerion's forum post, or click the "Source" link below. Hurry -- codes are still available, but in limited supply.
Update: And they're gone.