No sign of her. That's either very good... or very bad.
Nate when he finds Elena's parachute
Template:Uncharted walk "The Fortress" is the fifth chapter of Uncharted: Drake's Fortune.
Synopsis
As Nate treks through the island, he stumbles across a large old fortress. He begins scaling the outer walls of the fortress before breaking in through one of its windows. He finds himself inside the fortress walls, but outside the building itself, stuck in its many outer courtyards. He fights through waves and waves of Eddy Raja's pirates as he searches for Elena, and makes his way toward a small ruined tower that her parachute is hanging off of.
Upon arriving, he finds the parachute harness empty. He climbs up to a hole and zip-lines down to into the roof a building below. He glimpses Elena filming out through one of the upper windows. Down below is a closed gate. Using a foreign language, he speaks through a microphone to one of the goons by the gate. The gate opens, but they notice it is Nate, and they start shooting at him. After taking down these guys, Nate presses on, looking for a way up to Elena. He enters the flooded chambers beneath the fortress and pushes his way forward, again fighting through large groups of pirates.
Walkthrough
Part 1
Upon reaching the fortress, be prepared for some skillful climbing. There are several small ledges and a couple of vines along the wall of the fortress. When swinging on the vines, make sure you build up enough momentum before swinging your way further. You will come across a vine, which will take you up to a window. Once inside the building, head right into the hallway, and climb out the first window to your right. You will need to bound your way around the wall again until you get to another vine. Climb up the vine, then press 
and Nate will grip the vine and bust through the closed window.
Part 2
Once you are back inside, you can head over to a nearby crate to pick up a Micro-9mm and a few grenades. Head through the hall to the right, turn left to enter an area with some enemies. Take out the first few guys, then head up the stairs leading to the top of the fortress wall. Turn right, and take out the guys on the wall, at the end of the the wall, carefully jump down into the yard below. Head up the stairs and you will approach another yard with enemies. There are several dynamite barrels in the field. Use them to your advantage when clearing out these enemies. Watch out for the guy on the turret! You can toss a grenade towards him if possible. After all enemies are down, you must now search for the tower Elena's parachute is in. Climb the stairs to get back on top of the fortress wall. Head to the tower, climb the stairs within it, and press to trigger a cutscene.
Part 3
After the cutscene, you will be fighting another wave of enemies. On the table is a Wes-44 if you want to use it. Take out the enemies, then head through the gate, leading you into a large flooded hall. At the end is machine gun. You will need to enter the room on the right and grab a M79 to take the turret out. Once that's done, head down there, climb up, then jump down into the flooded chamber on the left. You will then be attacked by more enemies. After you take them out, climb onto the narrow platform closest to the one with the door.
Part 4
Open up the door, then you will enter another flooded room. To reach the high path, you will need to raise the water level in this room. First, head to the left, climb up the ledges along the wall to make your way to a winch. Activate it to raise the water. Then head to the other one on the opposite side of the room and do the same thing. Once the water is high enough, you can climb the two ledges to reach the path leading to the next chapter.
Trivia
- Although the chapter is entitled "The Fortress," the Uncharted 2: Among Thieves multiplayer map is called The Fort.