Left4Dead dev opens up on why it parted ways with Valve

- Turtle Rock co-founder Phil Robb, as reported by Eurogamer. In 2008, Valve acquired Left4Dead developer Turtle Rock Studios -- but later divested the studio, which continued to work on the franchise. In a new interview conducted at an event for its latest game, the 2K Games-published next-gen shooter Evolve, co-founder Phil Robb delved more into his studio's relationship with its former owner: "Whenever we were working with Valve, it was kind of crazy. They take their time, y'know? Valve time's a well-known thing, but for us it was like we want to get this shit done... The culture changed a lot when we became Valve, and not all of it was what we felt was the right way to go, and it wasn't the way that we wanted to work." Robb told Eurogamer that "we got a lot of it back" when the studio regained its independence, a decision he said was reached mutually, as it "made the most sense." The full Q&A has more details of the Valve/Turtle Rock breakup.