Fallout: New Vegas patches

PC

 * Fallout: New Vegas patch 1.4.0.525 - current, released on July 7, 2011. Fixes numerous issues and adds compatibility for Old World Blues.
 * Fallout: New Vegas patch 1.3.0.452 - released on April 25, 2011. Fixes numerous issues.
 * Fallout: New Vegas patch 1.2.0.352 - released on February 21, 2011.  Engine update only.
 * Fallout: New Vegas patch 1.2.0.314 - released on December 14, 2010. Fixes numerous issues.


 * Fallout: New Vegas patch 1.2.0.285 - released on November 10, 2010. Fixes some crashes, resolves problem with companion and menus.
 * Fallout: New Vegas patch 1.1.1.271 - released on October 21, 2010. Fixes the auto and quick save bugs introduced by Steam Cloud.
 * Fallout: New Vegas patch 1.1.0.268 - released on October 20, 2010. Resolves around 200+ quest and scripting issues.

PlayStation 3

 * Fallout: New Vegas patch 1.6 - current, released on July 5, 2011. Fixes numerous issues and bugs. Prior to Old World Blues
 * Fallout: New Vegas patch 1.5 - released on April 25, 2011. Fixes numerous issues. Available in Europe, despite PSN being down when this patch was released it was still available to those connected to the internet.
 * Fallout: New Vegas patch 1.4 -Released February 18, 2011. Fixes some bugs reopened with 1.3.
 * New Vegas patch 1.3 - Released February 8, 2011. Added Dead Money add-on trophies.
 * Fallout: New Vegas patch 1.2.0.310 - Released December 9, 2010.
 * Fallout: New Vegas patch 1.1 - Released October 20, 2010. Resolves around 200+ quest and scripting issues.

Xbox 360

 * Fallout: New Vegas patch 1.3.0.444 - current, released April 28, 2011. Various weapon adjustments. A second version of this patch was released on April 30, 2011. This second version was issued to get rid of a bug that caused certain users to be unable to load their saved games. Added Dead Money achievements.
 * Fallout: New Vegas patch 1.2.0.315 - released December 16, 2010
 * Fallout: New Vegas patch 1.1 - resolves around 300+ quest and scripting issues.

Removing patches
Playstation 3 - From the XMB navigate Game->Game Data Utility->Fallout: New Vegas->(X)->Delete->Yes. (NOTE: The size is ~4GB this is because this is all the game data that was installed when you first played the game. The patch downloaded from PSN was implemented with this data. You must delete all this data to remove the patch. The game will reinstall itself next time you load it up. This will NOT delete your game saves.) Doing this will not remove the pre-ordered content because the pre-ordered (DLC) is a separate file. After removing the game data and installing it again: When you attempt to load from a game save the game will warn you that you are missing content. Select yes on the prompt and you should be fine. (Remember do not install the update)

Xbox 360 - From the Xbox 360 Dashboard, go to the "System Settings" and select "Memory". From there highlight your Xbox's primary storage device (usually the hard drive, unless you are using an Xbox 360 Arcade unit, in which case you would select the on board memory). And press Y. From the next menu that appears, select, "Clear System Cache". Select Yes on the warning screen that appears, and you're all done!

UPDATE! It appears that the Xbox 360 process has changed. This was discovered on a normal 360 (not Arcade or Slim). Clearing the system cache did nothing. To delete the actual patch you would to go to System Setting > Memory > primary storage device > Games > Fallout New Vegas and delete "Fallout New Vegas title update #4". When you start up the game again you will be told that there is an update to the game and if you opt not to download it now you will be signed out of Xbox Live. Then, when you try to load your saved games, you will get an error stating that the game relies on content that is no longer available and an option to back out of the load. Side Note: Looking on the Bethesda boards found that you can clear the game cache by holding both bumpers and the "X" button while the game loads, and this helped some loading/freezing issues. Video on how to remove this patch on Xbox 360 GioZMUEBazo

Unofficial patches (PC only)

 * For Fallout New Vegas in English: Community Fix Compilation Patch by The New Vegas Community. A fork of Zenball's original compilation patch.
 * Also for Fallout New Vegas in English: Community Bugfix Compilation Patch by the Nexus Community [currently outdated as of 6/21/11].
 * For Fallout New Vegas in French: Patch Non Officiel Fallout New Vegas by the Wiwiland PNO team. (Compatible with last official patch.)
 * For Fallout New Vegas in German: Community Fix Compilation Patch by The New Vegas Community. A fork of Zenball's original compilation patch, translated into German.