Rise of the Tomb Raider: Cross the bridge, walkthrough Rise of the Tomb Raider guide, walkthrough

The last thing you need to do is cross the destroyed bridge towards the gate that you have just destroyed. You will have to jump over a rift several times, using hook and rope (press X in mid-air, after you jump), and kill several Deathless more. You should be able to deal with the mall with explosive arrows.

At the end of the bridge, attach rope over which you can zipline towards the gate.