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A Missile Launch Base has fallen into the wrong hands. Storm the base, clear it out, stop the warhead from launching, and save the day.
— Brief.

The Doomsday Scenario is a heist featured in Grand Theft Auto Online as part of The Doomsday Heist update. It is the heist finale of the Act 3 of The Doomsday Heist and the final mission of the same mission strand.


The crew is instructed to go to a lot in Grapeseed to pick either the Barrage ATV or the TM-02 Khanjali tank. Lester will tell the crew that the vehicle not used by them will be sold for an additional profit for the crew member who set up the operation.

With the vehicle picked, the crew is ready to go to Mount Chiliad's secret entrance in the tunnel. Once close to it, Lester manages to hack the secret entrance door behind a set of electrical boxes so the crew has an opportunity to get in there.

Once inside, the crew is instructed to go to the end of the tunnel while dealing with Avon's army, who will try to stop the crew with barricades consisting of barrels and Mesas, as well as Insurgent Pick-Ups. Once the crew reaches the end of the tunnel, the crew clears the site from four Juggernauts armed with Miniguns. However, the vehicle is unable to pass through the tall barriers, forcing the crew to fight on foot. Phoenicia Rackman and Agent 14 instructs the crew to destroy five Avon's supply boxes while clearing up the loading bay from more Avon's mercenaries. Eventually, Cliffford shows up, knowing that they would come to stop them and taunting the crew while they fight off against more mercenaries and a Juggernaut. As the crew manages to destroy the supplies, they are instructed to go to the blast doors, but suddenly, through Avon and Cliffford's conversation, Cliffford activates the launch protocol for the missile.

Outside the blast doors, a cutscene plays where the crew is unable to open them, with Cliffford taunting them for this. Lester, however, tricks him by saying he has not hacked the door since he never opened it in the first place, and that he should prove it, after which Cliffford proceeds to open the door, allowing the players to progress.

Inside the control room, the crew is instructed to hack the four consoles on the second floor while fighting off endless waves of enemies, all within the 20 minute limit before the missile is launched. The player will be then set into a hacking "minigame" where they have to move a set of panels to guide a beam and burst Pockets (blue nodes) while avoiding the Firewalls (red nodes) within a five-minute limit. If the player successfully manages to burst the blue nodes, the minigame is completed and they have to repeat the process for all of them.

Once the four terminal consoles are hacked, the launch protocol is shut down, but the crew must continue with the next objective. After taking out all of Avon's goons, the crew head to the Orbital Cannon controls upstairs to destroy the four mobile cloud servers around the state, being Brickade trucks. Each crew member can use their own terminal. Destroying a truck severely affects Cliffford's functionality to the point that it "dies" once all four trucks are destroyed. Avon, however, claims that he will bring it back with the original code he still has. Rackman instructs the crew to go to the silo to stop Avon, again while fighting off more mercenaries on the way.

The player as he goes after Avon Hertz.

Once the crew arrives, a cutscene plays where Avon takes a Thruster and escapes through the launch chamber. The crew fails to stop him with their Pistols and Lester orders them to take the other Thrusters and chase him. As the cutscene ends, the crew is instructed to chase and kill Avon while taking care of enemies in Buzzard Attack Choppers and Akulas. The crew then manages to take out the defense group and ultimately kill Avon. Once the task is done, Agent 14 instructs the crew to regroup at the Galileo Observatory, after which the mission is completed.


After delivering the vehicles, a cutscene plays where Mrs. Rackman will thank the team for their efforts, awarding them with a large sum of money before leaving with Agent 14. Lester then thanks the team as well before parting ways, with the crew members also celebrating.

Mission Objectives

  • Go to Grapeseed.
  • Get into the Barrage or the Khanjali.
  • Wait for your team to get into the same vehicle.
  • Go to the tunnel entrance.
  • Get to the end of the tunnel.
  • Go through the tunnels.
  • Destroy the supplies.
  • Get to the control center.
  • Go to the second floor.
  • Go to the server.
  • Protect your team while they hack the server.
  • Take out Avon's goons.
  • Go to the top floor.
  • Wait for the rest of the team to arrive.
  • Go to an Orbital Cannon.
  • Destroy the mobile cloud servers.
  • Go to the Lab exit.
  • Get to the Silo.
  • Take out Avon Hertz.
  • Deliver the Thruster to the Observatory.
  • Help deliver the Thruster to the Observatory.

Elite Challenges

  • Complete in under 30:00 minutes
  • 0 hacks failed
  • 150 headshots
  • Nobody gets wasted

Video Walkthrough


GTA Online Doomsday Heist Act 3 - The Doomsday Scenario Finale (Elite & Mastermind II)


  • When approaching the tunnel to where the supplies need to be destroyed, Mrs. Rackman may sometimes speak dialogue of the player successfully destroying the supplies, even before any has been destroyed.