In this page you can find a walkthrough for the fifth chapter in Uncharted: Lost Legacy called "The Great Battle". This level is definitely one of the longest in the game. During it you will have to, e.g. climb a lot, visit forgotten ruins, run away from enemy armored vehicle and survive a fight with Asav. Also, don't forget about secrets because this stage has fifteen of them.
Start the level and follow a linear path. The only part in which you must stop is after jumping on a lower stone ledge - a conversation icon should appear above Nadine's head which indicates that you can have an optional conversation (1/5).
The optional conversation, mentioned above, isn't the only secret that can be unlocked in this part of the map. You can also examine the area near a chasm because there you can come across a treasure (Padouk Tee Caddie) presented in the picture above.
Jump on a lower ledge again and reach a tree on which you can find an interactive hook. You need to swing, jump on one of the edges and start moving left. Reach the upper stone ledge where you can find a place to take a photo (1/4).
After that you should search for a wall which allows you to start climbing again but also to use the mountain climbing pickaxe. The first thing you should do when you reach the top is to jump down on previously unreachable stone ledges in the middle. Look around the area and search for small ruins near a waterfall which are presented in the picture. There, you can find a new treasure (2/6 - Engraved Ewer).
After finding another secret you should search for a place where you can perform a long jump to an opposite wall. Don't forget to press Square during the last part of the flight because you must hit the wall with your pickaxe.
Again, search for a hook and reach a gigantic monument by using your grapple hook. When you get there you must start climbing on it and follow a linear path. Keep moving to the left, even after you fall and catch a lower edge. A few steps later you must lean back and perform a jump. Here, you must climb on monument's fingers and reach the ledge where Nadine is.
Climb on a higher neighbor ledge and wait for a chance for new optional conversation (2/5). After that you must look up and attach your rope to another hook. Swing on the rope so you can jump on a stone ledge located left from a small waterfall.
Here, you must start climbing a gigantic monument again. This part, just like the previous climb, isn't difficult although during it you must use the grapple hook again but also you have to use edges to move to the sides which happens in certain places. During the later part of the climb you must be ready to climb on Nadine which allows you to avoid falling into abyss. Soon, you reach a new vantage point where you will have to watch a short cut-scene.
Soon, you will reach a new viewpoint, where you will watch a short cutscene. Go left a bit and turn back, you will spot the first opportunity to take the photo of Nadine's. This is another photo opportunity location (2/4). You can now go further left to find an interactive hook.
When you can control Chloe again you must carefully go left and get closer to a new interactive hook. After swinging and performing a jump you must continue climbing and walking on narrow stone ledges. When you are on your way you can check out the area presented in the picture above. Here, you can examine a boulder which unlocks a new optional conversation (3/5).