Ive been trying to complete the killer challenges and the only thing i need is an ultra kill. Ive gotten one before too but i wasn't at master prestige yet so my challenges reset. It sucks because i cant hardly ever find a ground war game anymore to even attempt this challenge. I got a dna bomb in infected to get my 8+ chain but i really dont feel like going through the frustration of trying to get more dna bombs and hoping it kills exactly 8 people. If theres enough people on here that want to party up and go into infected to help each other finish their challenges for kill chains or anything else than we can easily knock them out real quick. Leave your gamertag and platform here if your interested. Im on ps4 so leave your psn here if interested and i can try and get some people together.