Once the armored van is parked, leave the vehicle and approach the security door. Once you’re inside, pick up the money bags when instructed then follow your partner and the guard as he leads you down to the burn room.
Upon reaching the furnace, you’ll be instructed to put the money on the table then shortly after, to kill the guard. You can walk behind him and choke him unconscious or wait until you get a prompt to push the guard’s head in the burner.
Follow Giorgi and you’ll have to deal with two guards next. Crouch and slowly move behind cover behind the first nearby guard. Go to cover to lean against the money stack then press circle to execute a silent takedown while the other guard is not looking.
Once done, pick up the pistol the guard drops then sneak behind the other guard. Take him down as well to get his rifle. Regroup with Giorgi then interact with the vault door to trigger a short cutscene.
Since the alarm is triggered, find cover and wait for the first wave of guards that will arrive to stop you. They’ll be arriving in the main entrance in the middle of the room so you can actually ambush them as they come in. Remember to reload as needed and stay in cover. If there are guards running and changing cover, you can fire blindly behind cover to kill them. After taking out the first wave, another group of guards will appear. It will be better if you can take them out before they start flanking you. Once the gunfight is over, scour the area for ammo and weapons from the fallen guards.
Regroup with Giorgi and he’ll try opening the nearby gate. He won’t be able to open it so take control and you’ll have the first attempt in breaking in doors and gates. You’ll be using this mechanic a lot in the entire game so take note of this tutorial. First, move the left stick until the small bar turns solid green and it vibrates. This is the “sweet spot”. Press the square button to proceed to the second part of the process.
Next, the green spot will be displayed and the pointer will be moving from left to right. The closer you are when you hit the sweet spot earlier determines how long the green bar in this sequence will be. Press the square button at the right time so the pointer hits anywhere in the green bar to unlock the gate.
Head inside then pick up the adrenaline shot from the medicine cabinet then collect the guns on the table. Exit then take cover. Smoke grenades will be lobbed to your position and more guards will arrive. You can actually shoot in the direction where the guards will be coming from to score a few kills before another cutscene plays again.