Yes, it's one of those things where they add stuff to a game for free! We used to call them patches, but now we call them free DLC, at least when they have content and not just fixes in. A subtle distinction, don't you think? Anyway, Dungeon Defenders, the excellent FPS tower defence, is getting one of them. Actually I read wrong, it has got one, RIGHT NOW. It includes four new skins for the Apprentice, Monk, Squire and Huntress, new "holiday-themed weapons" and a "mission where you must deliver Christmas presents to random locations and defend them, ending in an epic boss fight with the evil Mega Snowman!"
Woo! Ludicrously colorful trailer featuring said snowman below.