Horizon: Zero Dawn Wiki Guide

The Mountain That Fell

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The mission The Mountain That Fell is one of the many Main Quests found in Horizon: Zero Dawn. It will automatically begin after you complete The Heart of the Nora.

Start by fast travelling as close to the objective as you can, then begin walking. As you get close, you'll have to start climbing up some mountains. You'll know when you're getting there because Sylens starts talking to you.

You will also begin encountering machines atop the various sections of the mountain. The higher you climb, the more plentiful and stronger they become. You can fight your way through these, or by using some stealth you can simply run past them. There will come a point where you fight a Stormbird, which can also be avoided by just dodging what it throws at you and contining to run towards the destination until the next cut scene. 


You've likely fought Stormbirds before, so this fight won't be much different if you choose to fight it. They can be a pain to deal with simply because they rarely stay still, so use the Ropecaster to solve this. You can pin it to the ground, then pummel it with arrows or other attacks before the ropes break. Tearblast Arrows are another great way to blow off several chunks of armor all at once.

Once defeated, continue following the objective marker. Don't worry too much about ammo or health, as the Stormbird is the last enemy you actually face during this mission.

Soon you'll climb your way into the Gaia Prime area. There is a lot of climbing and other odd traversal segments, so be prepared for a lot of movement based obstacles to overcome.

The first main thing you'll come across is a room Sylens uses as a workshop. His hologram can also be found inside. After speaking to him, unlock the door behind him then carry on.

The following section is entirely linear. The only reason to branch off is to collect Datapoints. If you aren't interested in those, simply keep pushing forward and follow the objective marker. You'll be led on a walk through the destroyed facility, learning more and more about what happened near the end of the Old World.

You know you're getting near the end when you come across Sobecks office, and then her memorial. Not only will there be several Datapoints in these areas, but there will also be a few cutscenes that play out.

Eventually, you will reach your goal, a room that has been air sealed since the collapse of the old world. A long cutscene will play out, as Aloy learns a dark truth. Afterward, go to the far side of the round table to pick up the Master Override.


With the Master Override now in your possession, exit the room and go right. Follow the path until you reach the zipline, then use it. At the bottom of the zipline, look at the wall it's connected to and you'll spot some ledges you can climb up. This will get you back near Sylen's Workshop. Continue inside and another cutscene will play as you talk to Sylens.

After, go to his workbench and you can pick up his spear, which will replace your old one. This new spear has a built in electric charge, making it quite powerful. This will also mark the end of the mission, and The Looming Shadow will automatically begin.

The Mountain That Fell - Very Hard - No Damage - Video Guide

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Horizon: Zero Dawn

Rated "T"
DeveloperGuerrilla Games
PublisherSony Computer Entertainment
Release DateFebruary 28, 2017
PlatformsPlayStation 4, PC