Fallout: New Vegas exploits

Exploits are "holes" in the game programming which allow a player to do something which the developers did not intend and alter the play balance in a way which cannot be rectified.

=General considerations=
 * Exploits are repeatable consistently.
 * Exploits are attainable with an unaltered game on an unaltered system. Third-party mods must not be present.
 * Exploits give the player some unintended benefit.

Quest-related

 * When doing the first quest to help the town folk get rid of the gang in town, run to the mine and follow a mine worker to the gang's hideout. The mine worker will kill the gang, and you can loot the bodies. Now, complete the quest by going back to town and activate the final fight. You can loot the bodies a second time.


 * Once in New Vegas, go to the Atomic Wrangler and pick up the quest "Wang Dang Atomic Tango". Find and recruit "Old Ben". Go back to the Wrangler and talk with him again. As long as you have 50 points in Speech you can cycle through the hire dialog and get 50 Exp per cycle.


 * In Camp Golf, accept the quest 'Flags of Our Foul-Ups' from Sgt. McCredie, then go talk to O'Hanrahan and mention helping the squad, he'll ask you to talk to the misfits. Go find Razz, the guy with the mohawk, and ask him about his squadmates, as long as you have 40 speech, you can repeat the dialog over and over again for 40xp each time.

Barter- and repair-related

 * The Infinite Money Glitch is back, Go to a store that has two identical items with different values. Buy the cheapest, and you should be able to sell it back for more. Repeat.

Videos
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Flame damage
Flame damage kills do not count against your karma.

Melee weapons
melee weapons strength requirement does not apply to the xbox 360 games ( ex. with 6 strength you can weild a rebar club that requires 8)