How to unlock the Ballistic Knife in Warzone and Cold War
The challenge you’ll need to complete to unlock the Ballistic Knife is as follows: Get a One Shot, One Kill medal and a Melee kill in the same life in 15 different matches You’ll need to keep an eye out for the medal appearing at the top of your screen! You need to get the full kill with a single shot, so if your enemy has already been whittled by your teammate, it won’t count, even if it would’ve been a one-shot kill anyway. Another thing to have in mind is that you shouldn’t leave the match when you’ve completed a notch on your challenge. It’s a pain, but it’s got to be don...
Source: rockpapershotgun.com