During bo7 bot lobby quest flow, an Uber Klaus round 8 stabilizer chip is the first step in the chain. This chip links into a Klaus escort inside the Cosmodrome.

 Trigger Uber Klaus in early quest timing

 Collect the stabilizer chip when the fight is over

 Release Klaus and then lead him to the Cosmodrome's ramp

 Position Klaus in the Support Systems node

 Once Klaus has been placed correctly, the Aether barrel step in Zarya will become a timed pressure near the scan machine. Surviving this pressure allows the barrel to spawn once the scan finishes.

 mmoset CoD: Bo7 Zarya Guide 

 The Cosmodrome scan equipment is also linked to the wonder weapon chain. So, the area continues to be important even when the barrel step has been completed. In BO7, the Necrofluid Gauntlet Zarya Cosmodrome scan step is one where the player can confirm their goal before continuing.

 Get ready to scan the area

 Remove the zone before the scan timer starts

 Keep one escape route open near your ramp

 The scan will be completed when you leave the yard

 The scanner step rewards safe use of cover and calm pacing, because the waves stack when the machine is in motion and the yard is open.

  Yuri's Lab & the Pigpen CoDe Board

 Yuri’s Lab can be found inside the Cosmodrome, and it is a room used for puzzles and survival during the main mission. It is therefore dangerous to enter without preparation. Yuri's Lab inside Zarya Cosmodrome can be found inside the POI's interior. This locati0n becomes relevant when the ingredient steps are complete.

 Bring all ingredients required before beginning the lab phase

 After activating the tray, watch the board carefully

 The symbol cues should be read without rushing.

 Holdouts should have a strong weapon.

 The Pigpen CoDe board in Yuri Lab establishes the interaction sequence on objects. They must be performed in the right order to progress the quest.

 CoD Zarya Cosmodrome 

 After the CoDe stage, the lab sequence changes into a survival-style holdout. This forces the player endure a tight combat with reduced security, and then the quest flows into a map wide search for three colors keys. The holdout phase in Yuri Lab is known as Blood Pour Holdout 75 Health, because of the health limitation that makes positioning and timing armor feel difficult.

 Armor plates should be stocked at the start of the holdout.

 Hold a corner where there is a clean line of exit

 Use field upgrades during crowd surges

 You can leave the laboratory after the event.

 Key hunting occurs all across the island. Search intention is usually indicated by Bruin key spawning near Crashed Rocket Zarya. Nightbird key locati0n BO7 Zombies Ashes and Terrapin map key locati0n BO7 Zombies Ashes are often listed as the other two in guides.