GTA Online's Doomsday Heist Act 3, known as "The Doomsday Scenario," is the conclusion to The Doomsday Heist series (see Act 1 and Act 2). In this action-packed finale, you'll face off against a formidable adversary, navigate treacherous underground facilities, and engage in intense aerial combat to save the world from destruction.
Completing Act 3 is no easy feat, but from infiltrating heavily guarded bases to hacking high-tech servers and mastering the art of the jetpack, our step-by-step instructions, found in the linked articles below, will ensure you're well-prepared for the challenges.
General Preparation Tips
Beyond the specific mission requirements detailed in each of our individual guides, general preparedness is key:
Stock Up: Always ensure you and your team have maximum snacks and body armor. You will need them frequently.
Team Communication: Voice communication with your team members is highly recommended. Coordination is crucial for many objectives.
Vehicle Choice: Vehicles like the Armored Kuruma can significantly ease certain missions. Plan your vehicle access with your team.
Role Assignment: For missions requiring different roles (e.g., pilot, gunner), decide assignments beforehand.
Patience: Some sections are tough and may require multiple attempts. Stay patient and learn from each try.
Doomsday Heist Act 3 Payout
The payout varies by difficulty and whether this is the first Doomsday finale you have completed after the weekly reset.
• Repeat on Normal: GTA$1,620,000
• Repeat on Hard: GTA$2,025,000
• First completion after weekly reset on Normal: GTA$1,979,640
• First completion after weekly reset on Hard: GTA$2,474,550
Rockstar increased these payouts on July 16, 2026.
Detailed Mission Walkthroughs
For detailed step-by-step instructions on each specific prep mission, setup mission, and the finale, please use the links below:
Prep Missions
Prep 1(a) – Marked Cash: Guide to acquiring the duffel bag of money needed for Agent 14.
Prep 1(b) – Recon: Learn how to conduct reconnaissance at the Pacific Allied Shipyard.
Prep 2 – Chernobog: Walkthrough for stealing the Chernobog missile launcher.
Prep 3 – Flight Path: Instructions for identifying and eliminating a target to retrieve a briefcase.
Prep 4 – Test Site Intel: How to retrieve intelligence on the Khanjali tank's test site.
Prep 5 – Onboard Computer: Guide to shooting down a prototype Hydra and recovering its onboard computer.
Setup Missions
Setup 1 – Rescue Agent 14: Detailed strategy for the mission to save Agent 14.
Setup 2 – Escort ULP: How to use the Chernobog to protect Agent ULP's helicopter.
Setup 3 – Barrage: Walkthrough for intercepting an ATV and destroying an enemy operation.
Setup 4 – Khanjali: Steps to steal the formidable Khanjali tank.
Setup 5 – Air Defenses: Guide to piloting the Volatol and destroying SAM turrets.
Finale
Act 3 Finale – The Doomsday Scenario: The complete, in-depth walkthrough for the grand finale mission.
