The Doomsday Scenario

Overview

The Doomsday Scenario is Act III and the finale of The Doomsday Heist in GTA Online. Avon Hertz is revealed as the mind behind the plot, and the crew must stop his artificial intelligence, Cliffford, from launching a nuclear attack. The act ends in a fight inside a launch facility hidden under Mount Chiliad in Blaine County.

Setup missions

Act III has five setups, each unlocked by a matching prep:

1. Rescue Agent 14 – free Agent 14, who has been captured.
2. Escort ULP – protect the ULP agent while they move through the city.
3. Barrage – use Barrage vehicles in an assault.
4. Khanjali – steal the experimental TM-02 Khanjali tank.
5. Air Defenses – destroy the air defenses that would protect the final target.

Approaches

There is one approach. The crew infiltrates the Chiliad complex, fights Hertz's forces and then must solve a final hacking puzzle to stop the launch.

Crew and tips

• Act III is the hardest part of the heist; heavy armor, snacks and good weapons are essential on Hard.
• The final hack is time-sensitive, so assign it to the most confident player.
• Using the Khanjali and Barrage in the setups is good practice for using these vehicles in freemode later.
• Completing all three acts in order with the same crew counts toward the Criminal Mastermind challenges.

Payout

Act III pays $1,800,000 on Normal and $2,250,000 on Hard. Completing the act also unlocks reduced prices for the Chernobog, Barrage, TM-02 Khanjali, Volatol and Thruster.