According to a report over on IGN
Activision has fortunately added a subtitle to the upcoming The Walking Dead first person shooter being developed at Terminal Reality, saving us all from further confusion with Telltale's popular episode adventure game series.
The Game will now be known as The Walking Dead: Survival Instinct, and will follow the a story set prior to the events in the AMC television show.
The Walking Dead: Survival Instinct brings the authentic, heart-stopping horrors of The Walking Dead to life in a way that’s unlike anything the series has ever seen. Terminal Reality’s upcoming video game is an all-new, first-person, do-whatever-you-need-to-survive game based on AMC’s Emmy award-winning series. In the game, players assume the role of the mysterious, crossbow-wielding survivor Daryl Dixon, alongside his overbearing brother Merle, on a haunting, unforgiving quest to make their way to the supposed safety of Atlanta.
The IGN article also mentions that an AMC competition will award chosen fans the chance to appear as a cameo character in the game, however it's restricted to residents of the US and Canada.
The Walking Dead: Survival Instinct is due on PC, Xbox 360, and PlayStation 3 in 2013