This isn't from an official source or anything, so take it with a grain of salt, but I noticed that there's a page for this game on Xbox360Achievements. Now, like I said, this isn't an official Microsoft site, so don't treat it as a real confirmation. At the same time, though, the site has been known to reveal a game's achievements early, so I figure it's at least worth something.
Oh, and its sister site, PS3Trophies, doesn't have a page for The Walking Dead. Not sure if that means anything.