Initially, the game had more realistic and militaristic visuals and gameplay, but this changed over the long nine-year development. Team Fortress 2 was announced in 1998 as Team Fortress 2: Brotherhood of Arms. Development was led by John Cook and Robin Walker, the developers of the original Team Fortress mod. Players join one of two teams and choose one of 9 character classes to fight in modes like Capture the Flag and King of the Hill. Valve's Steam, and Electronic Arts handles all of the game's physical and console ports It is distributed online through the digital retailer. Later in development, the game was released as a standalone title for Windows in April 2008 and was updated to support Mac OS X in June 2010 and Linux in February 2013. A PlayStation 3 version followed in December 2007 when The Orange Box was ported to the system. It was released in October 2007 as part of The Orange Box video game suite for Windows and Xbox 360. It is the sequel to the 1996 Team Fortress mod for Quake and its 1999 remake, Team Fortress Classic. Team Fortress 2 is a multiplayer first person shooter game developed and published by Valve.