Chapter 21: Brother's Keeper - Uncharted 4 Walkthrough
At the end of Chapter 20, Nathan, Elena, Sully and Sam had finally got together and decide to escape from the island as Nathan has got his brother back, but Sam had something different in mind. He didn't want to lose the treasure after coming so close so he decides to head for the treasure and Nathan follow him to save him for the last time. So without any further ado, let's begin with the walkthrough.
Head towards the top in order to climb and jump from the small gap up ahead then take left inside the cave where you will see Sam's trail. Make use of your Hook to swing across the far side and then climb through the gap to get some more trails. Keep following the trails until the climb up to the highest Rock to pick up more Sam's trail.
You need to climb high to head right around the end of the rock, now head inside the cave and find your way out towards the small campfire. Head Left to find some more footprints then enter through the short tunnel to slide down and jump to get inside the tunnel then drop down on the other side.
On your left is the next set of rocks where you must use the Piton to climb and then jump on the other side to use it again and climb right until you find a jump to the highest handhold. Swing across and jump and hook it again to do the next swing, now continue climbing up the cave.
Turn left to hook your rope onto the wooden frame and lower yourself down and make a swing towards the rough rock dig your piton and head down. Jump through the Gap and keep walking until you reach the slide down then while sliding head left to avoid the rock then jump into the gap on the right and again the Jump to swing into the water below.
Start swimming towards the cave with the blue glow then dive down to swim through the gap below. Keep swimming until you reach the wooden deck where the cutscene starts and thus completing the 21st Chapter of Uncharted 4 Thief's End and you can either continue to the Uncharted 4 Ending Walkthrough - The Thief's End or check out our Uncharted 4 Wiki Page for treasure, journals locations and Much more.