The Fallout: New Vegas patch 18.104.22.1682 (PC) or 1.5 (PlayStation 3) was released on April 25, 2011 for the PC and PS3 versions of the game. An Xbox 360 version, 22.214.171.1244, became available as of April 28. On April 30, a second patch was released for the Xbox 360 to resolve a loading issue that was experienced with the April 28th patch release. The patch is still considered 126.96.36.1994.
5mm armor-piercing rounds have a -25 DT effect. Standard and surplus rounds have a -10 DT effect. HP rounds multiply target's DT by 2, instead of by 3 as with other calibers of hollow point ammunition.
25mm grenades, both normal and high explosive, have had their damage increased from 35 to 50.
40mm grenades have had their damage increased from 50 to 100. 40mm incendiary grenades have had their damage increased from 35 to 75.
Price values for most ammunition types have been changed as well:
Spore plants have been altered to work differently within V.A.T.S.
Cazadors will no longer attack targets until they are significantly closer (4,000 game units, lowered from 10,000).
World and map changes
The wall dividing Freeside has been increased in height and has had barbed wire added to the top.
The second half of the Hoover Dam, behind the inaccessible door has had several changes such as the metal door to the Legate's camp has been moved closer to the dam. Also, the bridge/road to the Legate's camp has been removed (can only be seen before the battle at Hoover Dam).
Numerous quest items have had their weight reduced to zero. This includes the NCR items found as part of the Wheel of Fortune, Mister Cuddles, and the platinum chip.
Applying a stimpak on a companion after they have been poisoned by a cazador no longer decreases their health.
Sometimes when exiting to the Main Menu then returning to the game, the in-game day of the week would reset to Sunday. This no longer occurs.
For unknown reasons, numerous items have had their Form IDs changed, primarily—but not limited to—"behind the scenes" items like scripts and leveled item lists. These changes have been correctly implemented, in that other items which reference, incorporate, or otherwise refer to these changed items now point to the updated Form ID. Importantly, these updates can cause problems for any mods which altered the updated items prior to the patch, causing them to behave erratically, incorrectly, or even prevent the game from loading at all.
A partial list as follows:
Form ID changed
Old Form ID
New Form ID
References a changed record
Explanation of weapon statistics
"Base damage" is the damage done per melee swing or gun shot when the weapon hits its target.
For automatic melee weapons only, this is the damage done per second when the weapon is used outside of V.A.T.S.
"Min Spread" means the weapon has a minimum spread of that much degrees, even if the weapon skill is at maximum. So, if a weapon has a Min Spread of 5, bullets can go out of the barrel by at least 5 degrees off.
"Kill Impulse" is the physical effect a weapon has on the target after they are killed, as in how far they are knocked back or thrown.
"Spread" is not fully understood, but seems to affect only multi-projectile weapons or shots traveling over long distances.
"Sight FOV" is the field of view a weapon zooms to when aiming it. The lower the number is, the larger the zoom magnification.
Installing the patch may cause the map to disappear when fast traveling or removing armor/clothing that disguises you as a faction.
Installing patch 188.8.131.522 will cause the v1.1 G.E.C.K. editor to stop working. Bethesda has released the new v1.3 G.E.C.K., compatible with the patch, for download on their website.
If the Mercenary Pack is installed, and patch 184.108.40.2064 is installed after, the game will not play. After pressing [start], the message "Searching for downloadable content" will appear and will stay on the screen indefinitely, leaving the player unable to play the game. Deleting the patch will work, but it is not a permanent fix, as upon reinstalling the patch, this same bug occurs.
After updating, if you have the Canadian version of the classic pack with a US disc and US DLC's, all DLC will not be recognized.
Players can fix this issue by deleting the Canadian version of the classic pack and downloading the US version of the pack.
Deleting and Re-installing all add-on content will sometimes fix this issue.
After installing the patch, if you try to reload a save file which was used with the previous patch, a message written "this save file requires a downloadable content which is currently not available. Do you wish to continue?". It is recommended that you don't load any save file until an update of this patch becomes available to download or your save file may become corrupted. (Fixed as of April 30, 2011)
weapons that received cnd upgrades e.g. light machine gun, grenade machine gun, 12.7 smg can go from 100% cnd to much lower.
occasionally when inside a vendor shop or other area, music would still play as if you were outside.