Santa and Christmas themed DLC isn't an entirely unique thing and is something we've actually come to expect from many games these days but the difference here is that this time it's Serious Sam 3, so it's WAY more awesome than usual.

Right now you can grab "Santa Sam" and "Santa Sammy" costume DLC for free for the game, which itself is on sale for only $29.99 on Steam if you don't already own it. Check out a trailer for the Serious Sam 3 Santa fun after the break. 

http://www.youtube.com/v/ZuSo19RiH-A?version=3&hl=en_US