At the start of this area, turn around and run back to grab a treasure from the table. After picking it up, go down the flight of stairs in front of you. Five enemies will run out from the door on the other side of the room. Take cover and use the AK to take them out quickly, especially the armored one with the shotgun who will creep in after the others. Watch out for the low-hanging ceiling in this area if you throw grenades, as it can send them bouncing right back at your feet.
When you walk further out into the room, a shutter will open on the left and more enemies will begin to pour in. A thug with a shotgun will be the first to walk through. Take him out before proceeding to cover opposite the shutter’s opening. Three more enemies will fire at you from within. Pick them off and trade out your sidearm for one of the Micro 9MMs that they will drop if you are particularly fond of automatic weaponry; a section later in this level will force you to use your sidearm a lot, so be sure to pack a good one. Don’t walk through the shutter’s opening just yet, though. Instead, turn to the right and head to the far side of the room. Walk through the thin doorway that the first wave of enemies came through. Look on the shelf to the left to find a treasure.
Now head back out to the room that was covered by the shutter. Grab up any more ammo that you may need and approach the truck in the center of the area for a cutscene. While Chase searches the truck for her amulet, you will have to fend off two more armored enemies with shotguns. Go for headshots to ensure that they do not get too close. Another cutscene will play in which a disappointed Chase says that her amulet was nowhere to be found in the truck. Before she can think of another spot to search, another group of enemies will attack from the room in front of you. They have the advantage of height, as they will retreat to a balcony and try to shoot down upon you. Toss a grenade up onto the balcony when they all group together. If there are any stragglers, shoot them through the cracks in the rafters so that their gunfire won’t be able to reach you.
Run into the lower floor of the room and go to the right to find a treasure by the bucket and stack of tires. Pick it up and run up the stairs and into the small room straight ahead. Stand by the shelf with a bucket on it and take a picture of the sign with a picture of a microphone on it to get another secret unlocked. Now leave the room and follow Chase upstairs. A cutscene will play once you reach the top of the stairs, and you will find that the door to Guerro’s office is locked. Drake will volunteer to find another way around.
Turn around and head back down the stairs. When you reach the second floor, an enemy will burst forth from a previously locked door on the other side of the hall. He is alone. Shoot him and continue into the room that he came out of. Another cutscene will play in which Drake notes a large truck full of dynamite. Stand by the table with the toolbox on it next to the truck to prompt another photo. Take a picture of the dynamite in the truck to ace this one. After you get your picture, climb onto the crate with the yellow tarp and jump from there to the dangling chain, and from the chain to the metal overhang far above. You’ll need to climb up to reach it. Jump down and examine the table covered with papers to the right of the room to find a treasure. A giant map looms on the wall upstairs, but you don’t need to do anything with that just yet.
Instead, head to the door and press the icon to initiate a swiping minigame, thus unlocking the door for Chase. This will initiate a cutscene in which you will learn a little more about Chase and her motives. Afterwards, you will have to take photographic evidence of the research that Guerro has amassed. A picture of the large map should suffice, so climb up the ladder and snap a shot. Go back down and Chase will lament that she can’t find her amulet anywhere. Drake will remark that there must be a safe somewhere. Approach the wall safe on the right-hand wall to initiate a cutscene.
Chase will hand you the combination to the safe. Punch in the code the same way you did earlier: Two rotations to the right, then stop on the numbers 9, 11, 2, and 5. Release the touch screen to open the safe and find Chase’s amulet. Just as you do, someone will come into the room. Chase will jump down and hide in the truck full of dynamite. Jump onto the chain and another cutscene will play. Dante is apparently getting sick of Drake’s company, and Guerro orders his men to find and kill him. As they do, the truck containing Chase and the dynamite will pull out of the garage and drive away. Four guards will come into the room and start shooting up at you. You’ll have to shoot them while hanging from the chain. The Micro works well here. Slide to the bottom of the chain and enter the next room.
Climb up the ladder in here. As you reach the top, two more enemies will attack you from across the gap. Take them out and go right on the walkway. Jump out to grab onto the monkey bars. About 1/3 of the way across, an enemy with a shotgun will emerge from the other side. You are probably low on handgun ammo by now, so be sure to go for the head as opposed to the armored torso. Climb across the other monkey bars, switching sides when necessary. More enemies will pop out as you reach about the 2/3 mark. These are simple, unarmored enemies, so they will be easier to kill.
Jump over to the platform. When you land, switch to your primary weapon and shoot the heavy with a shotgun who will come running out. Jump through the window for another cutscene and the end of the chapter as Drake discovers Chase’s fate.