The Fallout: New Vegas Prima Official Game Guide is a publication by Prima Games. It contains background information, location details, item descriptions, character backgrounds, maps, and walk-throughs for Fallout: New Vegas, as well as some additional background information about the setting and characters.
The Action Point description states that firing a pistol costs 10 AP, switching between standing and crouching costs 10 AP, firing a rifle takes 25 AP, and firing a Big Gun takes 75 AP. The section is an excerpt from Fallout 3 Official Game Guide regarding AP which was also incorrect.
In the walkthrough for the quest Come Fly With Me, the guide states that using the rockets' navigation terminal to cause the rockets to crash into each other will give Karma, when in fact the Courier loses Karma.
Cassidy Caravans wreckage is referred to as "[2.31] Reed Imports Sacked Caravan" (p. 303) as well as "[2.31] Cassidy Caravans Wreckage" (p. 320). In the game's Spanish version, the location is also referred to as Reed Imports.
In the entry on Sloan, Interstate 15 is referred to as both the Long 19 and Long 95.
In the entry on Primm, Interstate 15 is referred to as the Long 95.
On page 393, the Nipton Town Hall terminal overview reads, "A man with the Legion offers a deal Steyn passes up. It will be his undoing" but Steyn's terminal entry explains that he accepted the deal immediately, stating, "I didn't have to think a moment about Mr. Fox's proposition before accepting it."
On page 403, the Mojave Brotherhood's virtual reality pods are described as "currently (and permanently) offline" but in-game they are utilized by members of the group for tactical simulation.
↑Courier: "Do all of the brothers use this equipment?" Lars Taggart: "Everyone in the base has to spend a minimum of five hours a week running tactical simulations, but outside that, interest is scarce. It wasn't always this way. When we first moved into the bunker, everyone was so excited that the VR systems were intact. Over time, though, my fellows have become listless and less entertained by the wonders of the technology around us." (Lars Taggart's dialogue)