Once you get the location on the map reach the place, it will be some construction yard. You have to reach on the second floor and then towards the server. You have to kill them and reach Silo. Once done get to the Observatory. To destroy them fast use explosives, once they are gone you will be on foot, you have to keep progressing in the tunnel and keep shooting enemies blocking your way.
Optional add-ons such as an Orbital Cannon, Security Room, Lounge, Privacy Glass and Sleeping Quarters are also available. So get to the marked location, and there you have to retrieve a duffle-bag. So pick one as per your need and then move to a tunnel entrance. The leader will have the power to designate roles for all four players at different points. There is a plane ahead, kill all the guards around. Once you are done head to the Lab exit. Move the cannon slowly towards the target and destroy it.
Once you reach near Avon Hertz, you will see a cut scene after which you have to use the Jetpack and follow him. Crew Recruitment is not allowed. You can see all the marked turrets on the map. Once you reach at the end of tunnel, you will have to destroy more Avon's enemies. You have to reach the observatory and wait for the convoy. You have to reach Grapeseed first.
Drive into the tunnel, and you have to fight with enemies here. Watch for the Juggernauts also they will respawn in between. Please take a second to read over and look over the content that is not permitted. Upon purchasing a Facility, players can begin the Doomsday Heist by approaching the Planning Screen inside. You have to reach to the end of tunnel. As the mission starts you get instructions to steal a bag of money in order to save Agent 14.
Finale: Once you complete all the preps, and setup above you will be able to get to the finale. As previously announced, each four-man group that attempts a heist will need to designate one player as a leader. They will also chase you, so shoot them. Please see for more information on the specifics behind this. One of the best ways of getting a handle on everything new is by checking out the official patch notes, also released today by Rockstar, The Doomsday Heist is known as Title Update 1.
Kill the tea first and then take the Chernobog. No discussion of how to exploit or mod the game online. This will mean completing Freemode prep missions, tactical setup operations, and experimental weapons and vehicles - each ending with an over-the-top finale that brings a payoff big enough to comfortably share with your fellow crew members. Kill them and go to the top floor. To stay on the safe side, one of your team member can stay in the car and drive through the area, you will see the soldiers will come out.
Just go near the console and you will be able to see the view, you have to destroy around 4 mobile cloud servers. This is the ambush point where you will have to wait for a while. Go there and take the Volatol to Mount Chiliad. This will be a bit tough fight, as you will be using the goggle to track them down. Once you are done, destroying them by dropping bombs you have to take the plane back to the drop off point.
As you enter the tunnel there will be a cut scene, that shows a open door. Purchase of the Facility includes the optional ability to have your own Strike Team on call, or an Orbital Cannon capable of immolating any patch of ground that incurs your wrath. Others can protect the agent by destroying the chasers. There will be a cut scene in the end. Just get it and return to the facility. So go to the marked location on the map, and fight with the guards in the location. This bag is filled with money.