The Telltale Games website has release details on 400 Days, the new DLC for their episodic The Walking Dead game. The Windows and OS X PC editions will come tomorrow as part of a staggered schedule that begins with today's release of the DLC on PSN and will culminate a week from Thursday when the iOS edition comes out. This FAQ has details on this content and the explanation of why it's not included with season passes for the game, and word is they will be showing off some gameplay in a live stream on Twitch today at 3:00 pm EDT.