Patches to the game are deployed to Windows, Mac OS X, and Linux platforms via Steam, and must be downloaded and applied before the game can be launched.
While all three of these platforms retain the same codebase and any updates are released to both simultaneously, the version of the game on Xbox 360 platform is separate and does not receive frequent updates, due to restrictions imposed on game developers by Microsoft.
Patches are updates to Team Fortress 2 that fix known bugs, glitches, or exploits within the game, and often add new features or balance changes to weapons, maps, or other game elements.
Major updates are patches that add new weapons, game modes, or maps.
These maps include the Lazarus facility, which is a King of the Hill map that sees players starting outdoors and eventually having to make their way into the inner sanctum where a liquid Lazarus pit is located.
The jungle structures almost even make it look like Ra's Al Ghul might be hanging out there somewhere.
Finally, the Jungle Inferno update will also include a couple of yeti-themed emotes created by Valve and a batch of new community-created emotes.
Way back in the day, when we first shipped Team Fortress 2 as part of The Orange Box, we'd always planned on it being an ongoing project.
The potato hat was added to Team Fortress 2 at PDT on the April 5th, 2011 in a ~3.7MB update to the game.
Valve gets a heck of a lot of love, praise, hate, and embittered rage from the gaming community.
A lot of the praise comes from the pro-consumer take on its business model, while the hate usually spawns from a lack of updates to some of Valve's most beloved franchises, like Over on the official Team Fortress website, the new Jungle Inferno update is unveiled, featuring all new community-made maps, a Valve-themed map called Mercenary Park, and a plethora of updated and new content for players to enjoy. From the visitor centers to the security structures, it's pretty obvious Valve wanted the content to center around the popular dinosaur-themed movie series, and gamers obviously wanted those kinds of maps to populate the expansion.
Content packs are smaller updates that feature new content additions usually as promotional material for other games or events.
Updates containing community-contributed items submitted via the former contribution page (now replaced by the Steam Workshop) have also been released as content packs.