Second Life is a multi-user virtual world that allows people to create an avatar for themselves and then interact with other users and user-created content within a multi-user online environment. Developed for personal computers by the San Francisco-based firm Linden Lab, it publicly launched on June 23, 2003, and saw rapid growth for some years; in 2013, it had approximately one million regular users. Growth eventually stabilized, and by the end of 2017, the active user count had fallen to "between 800,000 and 900,000". In many ways, Second Life is similar to massively multiplayer online role-playing video games; nevertheless, Linden Lab is emphatic that their creation is not a game: "There is no manufactured conflict, no set objective."