Ghost Town Gunfight

 is a quest in Fallout: New Vegas. It involves the town of Goodsprings and a powder gang led by Joe Cobb. You can either save Goodsprings and destroy the Powder Gangers, or side with the Powder Gangers and destroy Goodsprings.

Quick walkthrough
In Goodsprings you are confronted by a group of Powder Gangers, they threaten to blow up the town, and you may either help them or help Goodsprings. If you choose to help the town, you may go around Goodsprings and ask for help from the locals, including getting dynamite from Easy Pete after passing an explosives check and receiving armor and weapons from Chet after passing a barter check, the rest of the town will then help you in ridding the town of the Gangers. Whoever you choose to help can then be controlled through the companion wheel.

Detailed walkthrough
The quest starts after overhearing Trudy arguing with Joe Cobb, and questioning her about the argument, or after Mitchell mentions an issue in the town of Goodsprings.

For the optional quests to get the town of Goodsprings against the Powder Gangers, many of them will need convincing. This is achievable by using the magazines scattered throughout the town to help. Chet has Salesman Weekly the mag needed to get Barter +10 to convince him. The other required mag will help you convince Easy Pete to use his dynamite. This mag is the Patriot's Cookbook, and can be sometimes found in the mailbox outside of Doc Mitchell's house.

Bugs

 * The Mag Patriot's Cookbook need to barter Easy Pete May not be in the Mailbox outside of Doctor Mitchell's house. You may have to reload the game and try again(confirmed on Xbox360)