All 25 Diamond Casino Heist Prep Missions

Every preparation mission in the Diamond Casino Heist, grouped by category. Scoping, general prep, crew selection, and approach-specific missions for Silent and Sneaky, The Big Con, and Aggressive. Each guide includes a walkthrough, time required, reward, and tips.

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Scoping & Setup (3 missions)

Mandatory (first time only) · 10 to 15 minutesCasino Scoping: Find Every Access Point Mandatory each heist · 3 to 5 minutesVault Contents: Reveal Your Heist Target Optional · 20 minutes including extrasCasino Heist Points of Interest: Every POI Explained

General Prep Missions (6 missions)

Mandatory each heist · 10 to 15 minutesVault Keycards: The One Prep You Cannot Skip Optional but strongly recommended · 20 to 30 minutesDuggan Shipments: Weaken the Guards Before the Finale Optional · 10 to 15 minutesGuard Patrol Routes: See Every Guard on the Minimap Optional — requires Casino Story Missions completed · 15 to 20 minutesSecurity Intel: Permanent Camera Cones on Your Minimap Optional — Big Con and Aggressive only · 8 to 12 minutesPower Drills: Cut Vault Drill Time on Big Con and Aggressive Optional — recommended for Aggressive · 10 minutesReinforced Armor: Survive the Casino Combat Waves

Crew Selection (4 missions)

Crew slot · Selection only — no missionBest Casino Heist Hacker: Avi vs Paige vs Christian Comparison Crew slot · Selection onlyBest Casino Heist Gunman: Comparison Across All Five Crew slot · Selection onlyBest Casino Heist Driver: Five Options Compared Optional · 10 to 15 minutesLevel 2 Security Pass: Skip the Hacking Step on Big Con

Big Con Prep (3 missions)

Optional — alternative to Yung Ancestor and Maintenance · 10 minutesGruppe Sechs Disguise: The Fastest Big Con Entry Mandatory for Big Con (paired with entry disguise) · 12 to 15 minutesNOOSE Exit Disguise: The Big Con Clean Getaway Mandatory for Big Con and Aggressive · 10 minutesVault Drills: Breach the Vault Door on Big Con and Aggressive

Silent & Sneaky Prep (4 missions)

Mandatory for Silent and Sneaky · 15 to 20 minutesNano Drones: Destroy 5 LSPD Drones for the Sneaky Bypass Mandatory for Silent and Sneaky · 20 to 25 minutesVault Lasers: Cut Open the Vault Without Triggering Alarms Mandatory for Silent and Sneaky · 15 to 20 minutesSneaky Infiltration Suits: Steal the Black Tactical Gear Optional · 12 to 15 minutesEMP Device: Disable Casino Cameras Mid-Heist

Aggressive Prep (3 missions)

Optional — unlocks tunnel entry · 15 minutesBoring Machine: Tunnel Into the Vault on Aggressive Mandatory for Aggressive · 12 to 15 minutesThermal Charges: Blow the Vault Open on Aggressive Optional — improves Aggressive loadout · 10 to 12 minutesUnmarked Weapons: Aggressive Loadout Choices Explained

Practice Upgrades (2 missions)

Optional purchase · Instant after purchaseCasino Model: Worth $130k for First-Time Heist Crews Optional purchase — Big Con relevant · Instant after purchaseVault Door Practice: Train the Big Con Hacking Minigame