So, you've probably seen those redacted, pitch-black slots in your calling card menu and wondered what the hell you're supposed to do to fill them. Honestly, the multiplayer Dark Ops BO6 grind is one of the most frustrating yet satisfying things Treyarch has kept in the game. Unlike your standard "get 500 headshots" chores, these don't give you a single hint. You either stumble into them by accident or you go hunting for them with a specific, sometimes ridiculous, plan in mind.
It's basically the ultimate "flex" for anyone who spends too much time in the lobby. If you see someone rocking the "Very Nuclear" or "Dark Indeed" cards, just know they’ve probably lost a significant amount of sleep.
The High-Skill Mastery Cards
Most of these are pure sweat. There's no way around it. You can't really "cheese" a 30-kill streak unless you're playing against literal bots, and even then, one stray frag can ruin everything.
The "Killer" tier is where most people start. You’ve got the Frenzy Killer (5 rapid kills), Mega Killer (6 rapid), and Ultra Killer (7 rapid). But the one that really tests your patience is the Chain Killer. You need more than 7 kills in rapid succession. This is almost impossible on large maps; you basically have to live in the Nuketown or Stakeout 24/7 playlists and pray for a lucky spawn flip while you have a loaded Chopper Gunner or a very aggressive SMG build.
Then there are the streaks.
- Relentless Killer: 20 kills without dying.
- Brutal Killer: 25 kills without dying.
- Nuclear Killer: 30 kills without dying.
A quick tip that some people miss: in Black Ops 6, scorestreak kills generally do not count toward your Nuclear medal. You have to use your actual weapons. However, the Hand Cannon and War Machine often count because they are "weapon-based" streaks. If you're going for these, running the Harp is non-negotiable for the constant UAV pings.
The Weird and Specific Ones
This is where the Dark Ops category gets kinda weird. Some of these you might never get in a million years of "normal" play.
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Circus Act is a classic. You have to kill an enemy by banking a Combat Axe off a surface. It sounds simple until you're throwing axes at walls like a lunatic while someone is actively shooting you with an AR. Honestly, just find a high-traffic room on a map like Skyline and keep tossing them at the doorframe. You'll get it eventually.
Then there’s Blunt Trauma. You have to kill someone with the direct impact of a Smoke Grenade. Not the explosion, not the smoke—the actual physical hit of the canister.
The best way?
Play Hardcore.
In Hardcore, players have way less health. If you see someone sniping and they're already hurt, chuck that smoke directly at their face. It’s hilarious when it actually works, but you’ll look like an idiot for the twenty times it doesn’t.
The Absolute Grinds
If you’re a completionist, the 100K challenge is your mountain. It’s exactly what it sounds like: 100,000 eliminations. There’s no trick. Just play. A lot.
Very Nuclear is the one that separates the pros from the enthusiasts. You need to earn a Nuke with 25 different weapons. Every single kill for that specific Nuke must come from that one weapon. You can't swap mid-streak. This forces you to get good with guns you probably hate, like the slower DMRs or niche pistols.
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A Quick Breakdown of Other Key Challenges:
- 2 Birds 1 Stone: Kill multiple uninjured enemies with one shot (outside of Hardcore). Snipers are your best bet here.
- Return to Sender: Kill an enemy by throwing back their own Frag Grenade. Use the Fast Hands perk or you’ll just blow yourself up.
- Ace!: Get four Ace Medals in Search and Destroy (wipe the whole team yourself).
- Hard Breakup: Perform 7 Finishing Moves in a single match. This is basically a stealth mission. Use Sleeper Agent and stay crouched.
Is Multiplayer Dark Ops BO6 100% Completion Possible?
Actually, you don’t need to do every single one to get the Mastery reward. The Multiplayer Dark Ops Master calling card usually unlocks after you finish 15 of these. This is a godsend because it means you can skip the truly broken or miserable ones—like trying to get a collateral kill on two "uninjured" enemies when everyone is constantly taking chip damage from across the map.
If you’re serious about hunting these, stop playing Team Deathmatch. Objective modes like Hardpoint or Domination make enemy movements more predictable. You know where they’re going to be, which makes banking a Combat Axe or landing a Nuke much more manageable.
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Actionable Steps for Your Next Session
- Set up a "Dark Ops" Loadout: Equip the Combat Axe, Smoke Grenades, and the Undergrowth or Ninja perks.
- Jump into Hardcore: It’s the only realistic way to get the Blunt Trauma (Smoke impact) or Buzzsaw (Triple kills) challenges done quickly.
- Use Sleeper Agent: If you’re going for Hard Breakup (7 finishers), this field upgrade is your best friend for walking right past the enemy front line.
- Track your Nukes: If you want Very Nuclear, keep a physical list or a note on your phone. The game doesn't always make it clear which 25 guns you've already "Nuked" with.
Don't burn yourself out trying to get these all in one weekend. Most of these calling cards are designed to be found over months of play. If you force it, you'll just end up hating the game. Let the weird ones happen naturally, and save the sweat for when you're actually feeling "in the zone."