The original Team Fortress was developed by the Australian team TF Software, comprising Robin Walker and John Cook,[failed verification] as a free mod for the 1996 PC game Quake. In 1998, Walker and Cook were employed by Valve, which had just released its first game, Half-Life. Valve began developing Team Fortress 2 as an expansion pack for Half-Life using Valve's GoldSrc engine, and gave a release date for the end of the year. In 1999, Valve released Team Fortress Classic, a port of the original Team Fortress, as a free Half-Life mod. Team Fortress Classic was developed using the publicly available Half-Life software development kit as an example to the community and industry of its flexibility.
Development of the new content had been confirmed (but later quietly cancelled) for the Xbox 360, while development for the PlayStation 3 was deemed \"uncertain\" by Valve. However, the PlayStation 3 version of Team Fortress 2 received an update that repaired some of the issues found within the game, ranging from graphical issues to online connectivity problems; this update was included in a patch that also repaired issues found in the other games within The Orange Box. The updates released on PC and planned for later release on Xbox 360 include new official maps and game modes, as well as tweaks to classes and new weapons that can be unlocked through the game's achievement system. The developers attempted to negotiate with Xbox 360 developer Microsoft to keep the Xbox 360 releases of these updates free, but Microsoft refused and Valve announced that they would release bundles of several updates together to justify the price. Because of the cost of patching during the seventh generation of video game consoles, Valve has been unable to provide additional patches to the Xbox 360 version since 2009, effectively cancelling development of the console versions.
Early \"Meet the Team\" videos were based on the audition scripts used for the voice actors for each of the classes; the \"Meet the Heavy\" script is nearly word-for-word a copy of the Heavy's script. Later videos, such as \"Meet the Sniper\", contain more original material. The videos have been used by Valve to help improve the technology for the game, specifically improving the facial animations, as well as a source of new gameplay elements, such as the Heavy's \"Sandvich\" or the Sniper's \"Jarate\". The final video in the Meet the Team series, \"Meet the Pyro\", was released on June 27, 2012. Gabe Newell has stated that Valve used the \"Meet the Team\" series as a means of exploring the possibilities of making feature film movies themselves. He believes that only game developers themselves have the ability to bring the interesting parts of a game to a film, and suggested that this would be the only manner through which a Half-Life-based movie would be made. A fifteen-minute short, \"Expiration Date\", was released on June 17, 2014. The shorts were made using Source Filmmaker, which was officially released and has been in open beta as of July 11, 2012.
Valve had provided other promotions to draw players into the game. Valve has held weekends of free play for Team Fortress 2 before the game was made free-to-play. Through various updates, hats and accessories can be worn by any of the classes, giving players an ability to customize the look of their character, and extremely rare hats named \"Unusuals\" have particle effects attached to it and are only obtainable through opening \"crates\" or trading with other players. New weapons were added in updates to allow the player to choose a loadout and play style that best suits them. 153554b96e