The Broken Sky is one of the main quests in Horizon Forbidden West (HFW). Read on to see the detailed walkthrough, rewards, location, and tips for the The Broken Sky quest!

The Broken Sky Overview

Basic Information

The Broken Sky Walkthrough

Objectives
1	・Go to AETHER's Coordinates ・Enter the Tenakth Stronghold ・Go to the Throne Room ・Talk to Dekka Ride to the Tenakth Stronghold and enter. If you're not interested in watching the Visions, flag the Throne Room objective on the map to filter it out from the other objectives.
2	・Meet Kotallo at Stone Crest After receiving your Sharpshot Bow from Dekka, ride your mount again and head off to Stone Crest.
3	・Follow Kotallo ・Talk to Kotallo ・Talk to the Guard Either fight or sneak past the Rebels. Sneaking past is fairly easy as they don't go out of their way to look for you. Only fight if you're interested in item drops or XP.
4	・Go to the Bottom of the Bulwark ・Scan the Bulwark ・Find a Path up the Bulwark ・Climb the Bulwark ・Clear the Obstruction ・Investigate the Passage ・Scan the Ancient Debris ・Talk to Kotallo Take the lift down. Then, scan the rock wall on Aloy's right after exiting the cliff side to find a metal object inside. Move back some and scan it again to advance to the next objective. Follow the path around and climb up into the cave. Scan the metal object again from the end of the cave.
5	・Find a Cannon ・Kill the Tremortusk and the Rebels ・Loot the Tremortusk ・Return to the Bulwark Go back out and follow Kotallo to the Tremortusk. Defeat the Tremortusk and the Rebels and loot its corpse. Then, use the cannon from the Tremortusk to shoot the target on the rock wall until it is destroyed to complete the Quest. Use Frost Bombs or Frost Arrows to inflict the Freeze status condition on the Tremortusk.

▸Next Quest: The Kulrut

Tips and Strategies

Hit the Tremortusk with Freeze

The Tremortusk deals big damage and can kill you easily when left alone, but inflicting it with the Freeze status condition will leave it effectively immobile.

Its Blaze Sac on its stomach is also a major weak point, so try to fill it with arrows as much as possible each time it rears up.

Fighting the Rebels

You can sneak up to the rebels and perform a Silent Strike. It should be enough to kill them instantly. You can also aim for their heads to deal increased damage.

Rebels with shields are weak against Acid Arrows. You can rain the rebels down using them to disable their shields temporarily and expose them to any attacks.

How to Fix Return to the Bulwark Bug

Kotallo sometimes gets bugged out when returning to the bulwark to fire off the cannon. To fix this, you can go up to base camp to trigger the autosave feature, select restart from save, and the quest should progress correctly from there.

Boss Strategy Guide

Tremortusk

How to Beat Tremortusk - Key Points

• Freeze Tremortusk using Frost Blastsling, Freeze Arrows, or Chillwater Drum.
• Shoot the Blaze Sac to cause a large explosion.
• Remove Tremortusks Components to reduce its attacking capabilities.

How to Beat Tremortusk: Boss Fight Guide

Horizon Forbidden West Quests

List of All Quests

List of All Quest Types

List of All Main Quests