There are many special achievements in "Call of Duty: Black Ops 6", and ending the party is one of them. If you want to do this achievement, you can perform 5 attacks on the guards at the party in "The Most Wanted" raid without being detected.
How to get the Party Ending achievement in Call of Duty 21 Black Ops 6
The party is over
In Most Wanted, perform 5 raids on the guards at the party without being detected.
This can be done at the beginning of the mission. I don't think you need to sit with Seif beforehand, but I did anyway. First, go to the coat rack and look for the guard.
Then go back through the same curtain and turn left to find two more guards facing the west wing. Lure them into a curtained area and take them out one by one. Move the first body away from the curtain they came from.
Next is the west wing area. Follow the door on the left toward the staff area, then go through the open door into the west wing. Here you can mark the last two defenders.
