250 points: $250
325 points: 400 XP
400 points: $500
In this challenge, you will begin with a .45 and cycle through different weapons every time you get a kill. This means that you don't have to reload at all during the challenge, making it a high-speed race to cycle through as many weapons as possible.
The ruins in which this challenge takes place are chock full of hidden Time Barrels, making this one of the challenges that you will definitely improve at as you play it more.