There is that unlocks the Armored Heller skin. You cannot buy it from the Blacknet Market. Instead, it is automatically unlocked as a New Game Plus reward after you achieve 100% completion in the game—including all story missions, side ops, and collectibles.
To unlock the skin in Prototype 2 , you need to complete all the Radnet Challenges . 1. Access Radnet prototype 2 how to unlock armored heller skin