Eye for an Eye (Fallout: New Vegas)

Eye for an Eye is a side quest in Fallout: New Vegas.

Detailed walkthrough
After discovering Cottonwood Cove, go visit First Sergeant Astor (who patrols around Camp Searchlight). You can initiate a dialogue about Cottonwood Cove and Astor asks the player to travel to Cottonwood Cove, collect some intel on Legion troop movements, collect intel on raids, and plant a bug in their radio.
 * The Legion raid intel is in a filing cabinet to the left of buggable radio (left while looking at the radio) on the first floor Command HQ building. The intel on Legion troop movements is in the desk on the second floor. Because taking both intel documents is considered stealing, this will give you negative Karma (Fallout: New Vegas).

Returning to Astor with the intel provides 500 XP, and the player gets an additional option to wipe out all Legion forces from Cottonwood Cove. This provides NCR fame, 250 caps, Legion infamy (if they spot you in the act), and 1000 XP. When you receive the option to wipe out the Legion fort, Astor calls you "crazy" but believes you can pull it off. To get the most fame with the NCR, locate the red truck hanging precariously off the cliff at Cottonwood overlook over the Legion camp. Your geiger counter will show radiation leaking from the truck when you get close. Go to the back of the truck, and select the door. The option to open the door becomes available (50 lockpick required), dropping several radioactive barrels into the camp, effectively killing the Legion the same way they killed the NCR forces at Camp Searchlight. Astor is quite pleased with this outcome.

Note: It is best to wait for all the barrels to fall into the camp before fast-traveling to talk to Astor. If you open up the truck but fast-travel to Astor too soon, then the game doesn't realize you've killed the legionaries using the radioactive waste. In addition, if you watch and wait until the entire camp has been killed (it can take a few minutes while the soldiers the furthest out run back to the barrels in the camp to investigate) afterwards you can loot all the soldier's bodies with no Karma penalties. Be sure not to forget the Centurion officer's body which is in or around the command building.

Behind the scenes
"Eye for an Eye" is a phrase dating back to the Babylonian Empire which expanded and thrived under the rule of Hammurabi. Hammurabi created a set of laws called Hammurabi's Code which stated that any crime would be punished by means equal to the crime perpetrated.

Also a principle found in the Bible, in Exodus 21:24: "Eye for eye, tooth for tooth, hand for hand, foot for foot."

Bugs

 * Sometimes dropping the radioactive barrels will not kill all the legionaries. They will remain standing in front of the barrels without ever succumbing to the radiation. Four legionaries line up at the base of the cliff while the barrels roll right through them. However, the objective is still marked as complete in spite of the fact that the survivors can still be killed, targeted through V.A.T.S., and otherwise interacted with.
 * The truck door isn't always locked, making the quest much easier.

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