Head down the left side of the screen. Ahead of you on the left is where the duct entry is you’ll come back to. Head down the fenced walk way. There are only a couple of armored guards wandering around here, but stick to the shadows to avoid the snipers. Head all the way down the walkway and enter the building from the rear. There’s a laptop in here, so go easy to avoid getting detected. There are two terrorists and one armored guard inside.
Once the fans are shut down, follow the marker to enter the ventilation system. There are a ton of lasers here, so it’s just pattern recognition and patience. You’ll need to pull yourself up onto small ledges and shimmy to avoid the lasers and the paths are usually the long way around.
Once through the tunnels, there are two ways out, one with a guard beneath you, and one into the empty dark. I opted for choice B. Drop down further into the floor to use the IT crawlspace. Follow the path to an ammo stock. Turn the light switch off, then open this door. In this next section there are two guards, two commandos, and a drone pilot. You don’t have to take him out, but it’ll help to be aware of him. Follow the marker into a big, open room. There are pipes on the ceiling to help you hide. Head for the duct on the far side when you have an opening.
Use the duct to buy time to get around the guards or get the drop on them. A commando will come out of the elevator when you move toward the marker. To the right of the elevator is an opening. Drop into it and use it to shimmy and climb across the atrium. Some laser dodging will take you to your marker, then you head out into the atrium. There are a number of guards here, including commandos, and some armored guys for backup. Be careful.
This next space is big, the guards are well-armed, there’s a lot of them, there’s an HVT, there’s a drone pilot. It SUCKS. The best advice I can give you is to do an assault loadout, take out everyone, and then explore at your leisure, without actually interacting with any of your goals. There are a TON of ducts to sneak through, and if you learn the path, you can totally get through this without ticking anyone off. Just don’t expect to do it the first time. The engineering section below is totally your friend for sneaking.
Wow things really escalated, didn’t they? In the end, you face off with Sadiq himself, and it’s all about sneaking. Stay within cover, and give him a WIDE avoidance path so you can get in behind him and use a sneak attack. And that’s all there is to it! Easier said than done though.