This page provides a walkthrough for the sixth chapter of Uncharted: The Lost Legacy - "The Gatekeeper". This chapter consists of two main stages. In the first one, you have to find Nadine, which involves securing the area in Western Ghats guarded by the enemy soldiers and an APC. In the second stage, you have to explore ruins, where you have to do a lot of exploring and climbing.
This chapter starts in Western Ghats, where due to the ravaging storm and activated aqueducts, access to the majority of the map is blocked out. Therefore, you will have to follow a quite linear path to reach the ruins neighboring the tower in the central part of Ghats. During your exploration, avoid jumping down from higher elevations. In such situations, follow paths covered with mud (Chloe will slide down over them, or various stone blocks onto which you can jump down safely.
Go East, towards the tall tower that you explored in chapter four. Main paths to the tower are blocked, bu7t you can climb up in the spot shown in the above screenshot.
You will get into a small room, where there is, e.g. a supply crate. Loot it, because apart from a rifle, you will also find a C4 charge. You have to use it to destroy the wall. After you have completed the tutorial on how to use C4 charges, slide down the slippery slope into large ruins.
There are enemies inside, but what is an even greater threat is the APC patrolling the ruins. It is recommended that you go stealthy here and, just like in many other situations of this type, you can rely on covers and tall vegetation. If you are spotted, move quickly into another part of the ruins. Try to hide inside a building then, because you can be run over by the APC out in the open (even if you are hidden in grass).
Try to eliminate enemies in the ruins one-by-one, in melee or using the suppressed pistol that you have found in the ruins. The APC is a greater problem. There are two ways in which you can destroy it. The first one is to use several charges of C4. You would have first to collect them from the crates around the ruins (try to obtain four, at most, to obtain a trophy). Then, plant them on the route of the APC (all of the charges should be placed in the same spot) and detonate them at the right moment.
Another way is to use an RPG to destroy the vehicle. Look around for locked crates (1/3)(2/3), to find one. It is best to obtain both of them, in case the first attack fails.
Keep in mind that the attack on the APC will alarm the soldiers and this is why you have to eliminate as many of them as possible beforehand. Eventually, there will also be enemies occupying a small elevation neighboring the ruins. Watch out here for heavier opponents who use shotguns and other powerful weapons. Also, while fighting them, rely on covers, but leave them when an enemy throws a grenade.
After the fight, check out the abovementioned elevation in the North-Eastern part of the ruins. Here, locate the rotary mechanism shown in the above screenshot. Chloe and Nadine have to interact with it and open the passage into the underground.
Explore the underground
The path across the underground is linear, at first. Along your way, you can find an item on the wall that can be examined - treasure (1/5 -10th Century Oil Bottle) shown in the above screenshot.
Head on and cross the corridor where you have to crouch. In the next location, climb up the stairs and locate another treasure (2/5 -Aged Silver Anklet).
Move on and you will soon reach an elephant female crushed by a pillar. Reach the ledge above and start tapping the interaction button to heave the pillar over to the other side. This will start your ride on the back of the elephant. During the ride, press buttons displayed on the screen. Additionally, you can press Square to feed fruits to the elephant.
The ride ends after you reach a location, where there are elephants. Here, find the photo opportunity location (1/2) shown in the above screenshot.
Apart from taking the photo, you can also find three more collectibles in the elephant cave. The first one is treasure (3/5 -Ceremonial Sugar Hammer), inside a small shrine by the waterfall. Another collectible is an optional conversation (1/1). The conversation icon should appear over Nadine's head after you climb onto one of the ledges above.
After you take the wide stairs, you will reach the third collectible - crate (3/3). Inside, there is Arrowhead A3c rifle and a C4 charge. Next to this one, there is another, open crate, but it is optional to loot it.
Follow the main path and climb onto the rock. Around, there are three more collectibles. Start by jumping towards the neighboring ledge, where there is a photo opportunity location (2/2).
Another area to check out is the single ledge shown in the above screenshot, where you can get using hook and rope. Here, you will find treasure (4/5 - Agate Gemstone Box).
To obtain the third collectible, you have to jump over smaller ledges and reach the spot shown in the above screenshot, where you have to crouch to move on. Here, you will find treasure (5/5 -Raja Raja Gold Kavahanu).
Only after you have found them all, grapple the hook and swing towards the wall shown in the above screenshot. You can jump there and grab on the ledge, but to get to the very top, you have to use your hatchet.
Keep climbing and, while crossing the cave, grab the long projecting spear. Up ahead, grapple the hook for the last time. The wide stairs will lead you to a location from which you can see Belur. This will start the next chapter.