- "Receive a random Perk not assigned to another slot."
- — Description
Secret Sauce is a perk introduced in Call of Duty: Black Ops 4. It comes in the form of a Perk-a-Cola in Blood of the Dead, Classified, Alpha Omega and Tag der Toten, and as a Perk Vapor in Voyage of Despair, IX, Dead of the Night, and Ancient Evil respectively. It can be unlocked for use at Level 6.
Secret Sauce will grant the player a random perk that has not been assigned to any other slot, and the Modifier granted when assigned to Odin/Tonic will grant the Modifier of the randomly assigned perk once the player obtained their other three perks. Unlike all of the other perks in the game, Secret Sauce can be rebought even if the player has already bought the perk, causing the perk the player previously had with Secret Sauce to change to another.
As with all other perks, there is no set location for Secret Sauce, and the location of the perk, alongside three others, can be customized in the Create-a-Class menu in Zombies.
- Perkaholic Relapse (15 /Bronze Trophy ) - Acquire every perk in a single game.