Grand Theft Auto V

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How to Complete The Data Breaches Heist

Shane Williams

This page is a walkthrough for The Doomsday Heist Finale Mission for Act 1. It’ll navigate you through the necessary steps to successfully infiltrating the Facility.

Overview of the Act 1 Finale Mission

Prevent the IAA Servers from being hacked

The Data Breaches Heist Payout

Difficulty Payout
Normal $650,000
Hard $812,500

Go through the IAA Base / Go to the War Room

Before you begin the mission, you’ll need to divide the Heist Payout between the crew. However, you’ll want to give yourself a fair bit more as the crew will get cash from the Setups whereas you don’t. Once you’re outside of your Facility, take your car over to the IAA Facility which is marked on your map.

(1 of 2) Use the surroundings as cover when taking out the enemies

Use the surroundings as cover when taking out the enemies (left), then use the facility's turrets to take out the incoming outside enemies. (right)

Upon arrival, take out a Combat MG and use the surroundings as cover whilst taking down the enemies, then go down to the lower floor and clear out the remaining enemies. After the base has been cleared of enemies, go back up one floor and enter the war room. Finally, take control of the gun camera and clear out all the incoming enemies to bring Act 1 of the Doomsday Heist to a close.


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Guide Information

  • Publisher
    Rockstar Games
  • Platforms,
    PC, PS3, PS4, PS5, Steam, XB 360, XB One, XB X|S
  • Genre
    Action Adventure
  • Guide Release
    16 September 2013
  • Last Updated
    9 August 2023
    Version History
  • Guide Author
    Claire Farnworth, Shane Williams

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