Once you're down below, turn to your left and you will see one security guard and a camera. Take them both out. Remember to go for headshots and use suppressed weapons. Moving forward you will see one more guard to the far right and two more having a conversation to the left. Take the one on the right first and then you and your friend should take out the two guards to the left simultaneously. Just time your shots with your friend and decide which one they will take and which one you are going to take down. After taking them out, keep moving forward by taking out the guards and cameras you come across.
Eventually, you will be asked to take cover and wait for the head of the security to come out. After a few seconds, they will come out accompanied by a security guard. Take them both out and get the access codes off of the head of security's body. Then continue to move forward by taking out the guards and cameras and enter the building through Server Farm Entrance.
Once you're inside, you will need to sneak to the four servers and hack them. There are two servers to the east and two servers to the west.
You and your friend can spit up in two teams. Be sure to avoid the vision of cones of the guards and do not run when near the guards or else they will be alerted. You can run as long as you are not nearby any guard. Just keep an eye out for the guards on your mini-map. Also, be very careful of the cameras.
Keep moving forward and towards the server. Once you start the hack, you need to match the nodes.
Now here's the trick, the node matching is completely random however you can keep matching them until they do not reset. If the match is incorrect, the correct nodes stay connected while the incorrect are not. So it's just a matter of how well you remember the pattern. For each node, you can only connect them incorrectly four times maximum. After that, the guards are alerted and you will be bombarded by N.O.O.S.E soldiers. So try not to do that. A tip here is that if you connect the nodes 2-3 times incorrectly, simply quit the hack and then start hacking again. It will reset the error count, but it will also reset the pattern, so the nodes which connected together previously, might not connect again due to the change in the node pattern.
After hacking is done, N.O.O.S.E headquarters is alerted regardless and you will need to fight your way back outside. A good tip here is when you have to head back to the middle, in order to go up stairs to the exit, stay on either the far left side or the far right side of the server room and keep running until you reach the middle section. This helps you avoid a lot of soldiers and minimizes the risk of getting shot at. This does not mean you won't have to kill any soldiers, you will still need to kill a couple of them. Remember to not rush straight to the middle, take your time, eliminate the guards and then move forward.
Once you and your friend are outside, there will be a heap of cops and N.O.O.S.E so clear them before moving towards the ladder to your Akula. There will be a couple of helicopters attacking you as well. If you have a mini-gun then quickly take the helicopters out using that or use an RPG. Then take cover and eliminate the rest of the cops.
As soon as you see an open window and feel like there are less cops outside, rush to the ladders leading back up to the roof and hop in the Akula. After that simply fly back to the facility in order to successfully complete this setup mission. On your way back, avoid the vision of cones of the cops and you will eventually lose them.
With the Server Farm mission accomplished and the data secured, you're now fully prepared for the Act 1 Finale. Find the finale walkthrough and other essential information on our Doomsday Heist Act 1 Hub.
