Turtle Rock Studios, the team behind Left 4 Dead and Evolve, currently working on an unannounced game, and it seems like it's going to be something big.

　　The development studio is currently looking for a Senior Level Designer who will be working on an unannounced AAA title. The game is a competitive first-person shooter in a globally known franchise.

　　Looking to work on a globally known game franchise? Join our exceptional development team as a Senior Level Designer on an unannounced AAA title. Do you love creating awesome level layouts and designing fun encounters? Do you enjoy watching people play through your levels and collaborating to make them even better? The job will require working closely with artists, engineers, and other designers to create awesome content.

　　Turtle Rock Studios is also working on another online co-op FPS revealed a while back, but it's not clear if it's the same game revealed in the recent job listing.

　　We are developing a new franchise set in an all new universe that leverages the style of gameplay our community loves and expects from Turtle Rock Studios. We’re focusing on what we do best – heart-pounding moment-to-moment online co-op FPS action. And with Perfect World as our partner, we will always make sure that our players come first by listening to them and growing the game based on how they play and interact over what we hope are many years to come. We cannot wait to show them what we have in store.