Threats: For the first time during the singleplayer campaign, some of the terrorists will be equipped with bulletproof vests. You should have that in mind while aiming at them. Headshots are most welcome. Otherwise you would have to sacrifice a whole clip in order to take down a group of 2-3 terrorists. Furthermore, some of the soldiers are carrying heavy machine guns or shotguns.
Objectives: You must reach an entrance leading to the main terrorist base. Once you're there, you will have to capture Derek Mergen (terrorist leader).
Before you proceed to the main area you will have to deactivate defensive systems of the terrorist base. In order to do that you must reach a certain checkpoint. You start off in a small rest room area. Open the nearby door (#1). You should be able to reach a larger area very soon. It's been occupied by enemy forces (#2). Start off with those soldiers who will be standing near the entrance. Don't make any sudden moves. Be sure to check all suspiciously looking spots for additional units.
The rest of the team should join you now. Duck behind one of the crates. It would be best to shoot at the terrorists from here (#1). You might as well try zooming in the view, to help you out. After that, head on to the next section of the distillery. Be careful! One of the terrorists will be hiding on your right (#2). You've got to take him out quickly.
Make sure you've cleared out the whole area before moving on. Head on to the small door that's located on your right (#1). There are some new terrorists inside this building (#2). Be careful! Some of them will use crates for cover. You can't let them surprise your team. Head on to the next door. Don't open it just yet. Wait for the rest of the team to show up.
Open the door and enter a new room. There are some new terrorists on your right (#1) and more of them will show up very soon. You will have to kill all enemy soldiers. Remember to aim at their heads, because some of them will be wearing bulletproof vests. Head on to the next room. Before you proceed any further, take out a single sniper and one of his buddies (#2). If you're lucky, you should be able to surprise both of them.
You can exit the warehouse building. There aren't any new enemies in the vicinity, so you might as well start running towards your current objective. Choose the path located on your left (#1). Here is where you will come across a new group of enemy soldiers (#1). I have to warn you. Some of them will be equipped with heavy machine guns, so you must kill them quickly. It would be wise to ask your teammates for much needed help.
Watch out for the canisters filled with a Legion virus!! You can't hit any of them!! New enemies will appear in a distance (#1). It would be best to kill them right now. Don't allow the terrorists to get to the left balcony. After that, start moving forward. Turn left. You should see a door. Once you're in a new corridor, keep moving forward. You shouldn't be worried about any new encounters at the moment. Once you've reached the stairs STOP and wait for the rest of the team to join you (#2).
Use the stairs to get to the upper platform. This area is being guarded by at least three additional terrorists (#1). It would be best to find a suitable cover. Surrounding tanks seem like a good idea. You may also use some grenades. Head on to the opposite side of the room. You will have to pick a lock on a nearby door (#2). Be sure to keep the rest of the team with you.
Open the door CAREFULLY. If you're lucky, you should be able to surprise one of the nearby guards (#1). Start moving forward. There's only one path leading to your current destination, so you can't get lost. Once you've reached a new door, reload your weapon. The new room is being guarded by a large group of enemy soldiers (#2). The terrorists will be coming from many different directions. Additionaly, one of them will be hiding on a nearby (left) balcony. You might also consider attacking their positions with a help from the rest of the team, however this can be very risky.
BE CAREFUL!! One of the terrorists will probably use a Legion-gas grenade! You can't get too close to the green mist (#1)! Otherwise your hero would have died almost instantly. Thankfully, the effects of the gas are only temporary, so the best thing to do is wait for a few seconds. Take care of the remaining terrorists. After that, head on to the nearest stairs (#2). They will lead you to the upper floor.
This area is being guarded by a single enemy soldier (#1). He will probably try and surprise your team. You have to be ready for that. Head on to the only possible door. The new room is going to be guarded by a large group of heavily armed terrorists (#2). It would be wise to throw a couple of grenades at them, although this is not a necessary action.
Take care of all of the remaining terrorists. Turn left. You should see a single laptop. Use it (#1). Thanks to that, you will deactivate the defensive systems of the complex. Head on to the nearest door (#2). Make sure the rest of the team is following you.
You should be able to reach a ladder in a few seconds (#1). Use it. This time you won't have to wait for your teammates. Head on to the nearest stairs. You will be attacked by a few terrorists (#2). Thankfully, they won't pose too much of a threat, especially since they're not armed too well. Use the stairs to get to the upper floor.
In order to finish this part of the mission head on to the designated exit (#1). You won't have to do anything else. Wait for the new map to load itself.