Chapter 3 - part 2 K&L: DM Guide
Last update: 11 May 2016
Eventually you should be able to reach the roof area of this building. Start running forward. You will have to jump over one of the obstacles along the way. You'll end up somewhere near a large glass wall (screen). Approach the air supply unit and press the E key to put gas in the ventilation system. You could wait for the gas to stun everyone in the bank, however I would recommend proceeding with the next objective right away.
New objective: Rappel Down To The Loading Bay
You shouldn't have any problems finding a green icon. That's where you'll be allowed to rappel down. Approach this spot and press the E key. Most of these actions are performed automatically. You'll probably notice that a security truck is heading this way. Get ready and approach the side entrance slowly.
New objective: Retrieve The Briefcase From The Vault
Order your squadmates to attack enemies standing inside the loading dock. Thankfully, security guards are poorly equipped, so you shouldn't have any major problems killing them. Focus your efforts on securing a small checkpoint which can be found to your right. Once everyone's dead, approach a locked gate and wait for the vaultbreaker to get here.
Be careful! Enemy guards will probably attack you from the left. You must kill them as soon as possible. Don't worry about the glass wall, because you'll eventually brake through. It's very important that they die quickly, because they're attacking the vaultbreaker. Enter a new room and wait for a cut-scene to be displayed on your screen.
Now you're going to split into two groups. Lynch will try and secure the main lobby of the bank and you'll have to get to the vault with your other colleague. Be careful. You will encounter a new group of security guards very soon. Start shooting at them from a larger distance. You should also remember that you can always ask your team member for more ammunition.
You will have to be moving towards the main vault area. Remember that you don't have to be in a lot of hurry. Hide behind pillars and walls in order to ensure your safety. You can also ask your team member to assist you if you can't kill someone by yourself. Eventually you will have to get closer to your goal. The vaultbreaker should automatically approach a nearby panel (screen). As you've probably suspected, your objective will be to protect him while he tries to get inside.