Meaning once you achieve the goal above in a game, you will wait until the next match to make progress towards this challenge. This needs to be done fifteen times across fifteen different matches. To unlock the Ballistic Knife you need to secure a One Shot, One Kill medal and a melee kill in the same life.
Here’s how to unlock this weapon and add it to your collection: How to Get the Ballistic Knife Hidden behind a challenge, this is one of the more difficult challenges offered - especially if you don’t use sniper rifles or melee weapons. While both the PPSh-41 and Swiss K31 are tied to the battle pass, you will need to actually put in some work if you want the Ballistic Knife. Of course, what most players care about are which new weapons they can unlock and wreak havoc with. Season Three of Call of Duty: Black Ops Cold War is officially live and it’s introducing new maps, changes to Warzone’s Verdansk, Operators, and firearms.
