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The Jury Rigger achievement for Fallout: New Vegas is worth 15 G

To get this achievement you have to repair 30 items.

Here's how I got this before completing the second main-line quest.

Loot everybody you kill or see killed. Pick up Varmint Rifles, 9mm Pistols, 10mm Pistols, and any other weapon you feel like. Armor wise, grab any Merc outfit, and if you find enough, Wastelander outfits work too.

The guns are repairable by exact copies, or, in the case of Specials, repairable by the lesser version. Any Merc outfit (at least any you will encounter through Level 4) can repair any Merc outfit, as is the same with the Wastelander outfits.

Press B to bring up your Pip-Boy 3000, and hit the LT or RT until you are on the items screen. The left analog stick will now control what you have selected (going up and down) and change the item category (left and right). On an item, you will notice in the top-right corner of the Pip-Boy screen is a set of 4 actions performed by a button on the controller. If you see the Y button lit-up (bright green in color on the default color), you can repair an item. Do this with every item you get, and you will knock this achievement out in no time.

A quick tip, for character creation: get Repair up to around 30 or 35 by the time you are level 3. This is what I've done with my characters, and it definitely helps (especially for this achievement).