Valve has managed to find success both as a game developer and through its Steam gaming platform, and a lot of that may come down to the companys famously flat structure. There are no managers at Valve, and the company doesnt track things like sick days or vacation time. In an interview with The Washington Post, Valves Gabe Newell provides a bit more insight into how the studio is structured, and why it can create culture shock for new hires. Its actually a pretty minor issue in terms of how much time people actually spend on vacation or sick leave, says Newell. …