Well Rounded (Level 140) – Get a kill with at least two different weapons without dying 100 times – 8,500 XP (Three Tiers)
Skilled players are more likely to complete this within Warzone naturally, as they can usually earn two eliminations easily with a weapon they picked up, then their loadout weapon in a single life.
Otherwise, try using close-quarters weaponry like an SMG as your primary to compliment your pistol or shotgun secondary in Black Ops Cold War, and focus on getting within a dozen meters of your targets, as that’s where both weapon types are usually most effective. Once you get a kill with one, switch to the other, then rinse and repeat. The Law Breaker Wildcard will also let you equip two primary weapons at once if you’re not as confident with your Pistol shots.
Looting and Pillaging (Level 150) – Replenish ammo 250 times while using the Scavenger Perk – 2,500 XP
Equip the Scavenger Perk and play aggressively to pick up those ammo packs dropped by enemies following their elimination.
If your weapon is holding ammo well, try using a Task Force Barrel on it. This usually boosts damage, damage range, and bullet velocity at the cost of starting ammo, making Scavenger a great compliment to this awesome attachment.
Bullseye (Level 160) – Get 10 kills with the Tomahawk or Throwing Knife Lethal Equipment – 2,500 XP
Tomahawks and Throwing Knives are thrown in a parabolic arc, meaning that at longer distances, you may need to aim higher than your target to hit the mark. Furthermore, these take time to travel through the air, so if your target is mobile, you’ll need to throw ahead of the target as well.
Worst case scenario: just chuck them right within an arm’s length of the target, and you’ll rarely miss the mark. There’s also the classic cross-map Tomahawk kill for those who prefer a more stylized approach.