Call of Duty: Black Ops Cold War

Hello,
03/04/2021 update
**********
Thank you for everyone's comments, Maka91 cleared up the issue in a comment
" If you press X at the mission select, and start the game on a new save slot under Veteran, you'll only need to complete 1 ending (Ashes to Ashes is easier). If you level select your way through a previous save, you'll need to do both ending if you have them both unlocked."
Full credit goes to him on this note, which also makes sense since I did Veteran on my first run through and just went back and did level select through the menu.

Thank you Maka91, never though I would ever get a comment on a solution from someone I watch and admire. Definitely a high point for me as an achievement hunter even if it's a basic guide on a pretty straightforward achievement.

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Some have mentioned in the comments that they didn't need to complete Ashes to Ashes if they didn't chose that ending. For me I did then it popped so your mileage may vary
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I would like to echo the other guides in saying it is to beat the campaign on Veteran.
But in order for the achievement to pop you must complete both missions, Ashes to Ashes and The Final Countdown. The choice for the different missions to either is found in the mission Identity Crisis.

Another side not is you DO NOT need to complete the side missions for this to unlock. I had only completed one (Red Circus) during my Veteran play through and still got the pop.

Hope this helps, Happy Hunting.

Hello,
03/04/2021 update
**********
Thank you for everyone's comments, Maka91 cleared up the issue in a comment
" If you press X at the mission select, and start the game on a new save slot under Veteran, you'll only need to complete 1 ending (Ashes to Ashes is easier). If you level select your way through a previous save, you'll need to do both ending if you have them both unlocked."
Full credit goes to him on this note, which also makes sense since I did Veteran on my first run through and just went back and did level select through the menu.

Thank you Maka91, never though I would ever get a comment on a solution from someone I watch and admire. Definitely a high point for me as an achievement hunter even if it's a basic guide on a pretty straightforward achievement.

******
Some have mentioned in the comments that they didn't need to complete Ashes to Ashes if they didn't chose that ending. For me I did then it popped so your mileage may vary
******

I would like to echo the other guides in saying it is to beat the campaign on Veteran.
But in order for the achievement to pop you must complete both missions, Ashes to Ashes and The Final Countdown. The choice for the different missions to either is found in the mission Identity Crisis.

Another side not is you DO NOT need to complete the side missions for this to unlock. I had only completed one (Red Circus) during my Veteran play through and still got the pop.

Hope this helps, Happy Hunting.

The only way to do it, is to just do it. There aren't many tips or tricks to complete it, but this doesn't mean there aren't any tips.

SMOKE GRENADES
They are your best friend. The A.I. in this game is laughable, to say the least, so smoke grenades are perfect for getting out of a sticky situation as they practically become blind everytime you use them. Trust me, it makes Operation Chaos so much easier.

COVER
Use it at every opportunity. Going out guns-blazing will get you killed faster than you can say "Solovetsky".

YOUR ALLIES
They can't die and they can kill enemies. Use this to your advantage. If you find yourself overwhelmed, fall back and let Woods or Adler thin the ranks.

PLAY THE CAMPAIGN BEFOREHAND
I originally played the campaign on Hardened, so I could have a faint memory of where all the enemies were and develop my own strategies for each mission. Of course, this tip is optional if you're just really a glutton for punishment.

LIE TO ADLER AT THE END
Ashes to Ashes is a far easier mission than The Final Countdown. Make sure to radio Perseus before setting of to Duga however, and don't light Adler's cigarette for a calling card. Or attempt to light his cig, I don't control you.

TIPS FOR OPERATION RED CIRCUS
The few people with rocket launchers on the roof are not a big threat, as most of the time, they're gonna miss. The snipers should be your biggest concern however. Throw your evac smoke near the building you killed Rudnick in, and sit and wait for the enemies to flood in and pick them off. Use your smoke grenades to safely get to the chopper. Also, you don't need all of the evidence to successfully identify Perseus's key assets. You'll get a calling card if you identify all 3 suspects correctly

TIPS FOR OPERATION CHAOS
Use cover, abuse your friendly A.I., abuse smoke grenades. Also, pick up the M76! Keep in mind that you absolutely need all of the evidence to shut down Aldrich's spy ring. You'll get a calling card if you do.