The most profitable heist of Act II. See the full guide for the optimal solo route.
The GTA 6 Diamond Casino Heist mission is the payoff for all the work done during Casino Recon, letting Jason and Lucia choose between a stealth approach or a full loud assault on the vault. It stands as one of the most replayable and profitable missions in the entire game.
The stealth route relies on the disguises and cloned keycards gathered during recon, letting you slip into the vault with minimal resistance, while the loud approach turns the casino floor into an all-out firefight against security and responding police. Choosing your crew members carefully before starting affects both the approach options available and your final cut of the take.
Successfully completing the Diamond Casino Heist rewards one of the largest cash payouts in the game and unlocks Family Business, moving the story into its next major arc.