The Turtle Rock Studios Careers Page indicates the Left 4 Dead and Evolve developer is working on a new unrevealed project. They list open positions for an "Unannounced new IP," including a Narrative Director, programmers, and artists. There's a hint at the scope of this from the descriptions. Here's word: "We are searching for a Narrative Director to help shape the entire narrative structure of our upcoming new AAA game for PC, Xbox One, and PlayStation 4. The Narrative Director will work closely with our Creative Director and Head Writer to create and oversee compelling stories, characters, and content that form the backbone of the game’s story." Thanks VG247.