This is a complete walkthrough for the In the Fog side quest in Horizon Forbidden West.
How to Unlock In The Fog
In the settlement known as Tide’s Reach, you can find Fenirra and Revikka. Speak to Fenirra to find out that she is injured after a conflict with her father, Garrokah, who stabbed her. She’s now concerned about him, and Aloy agrees to go and find him.
|Tide’s Reach from Fenirra||20||1x Sunhawk Shredder Gauntlet, 1x Tenakth Dragoon Face Paint|
How to Complete In The Fog
Go through these steps to complete this side quest.
Head to Garrokah’s Camp
The first place you’ll have to go is Garrokah’s Camp. It’s a pretty far distance, so call your mount to ride to it.
Down there, you’ll find his gear and you’ll be able to highlight the path with your Focus and follow it to an Acid Clawstrider in a fight with him. Help him defeat the Acid Clawstrider.
Defeat the Acid Clawstrider
The Acid Clawstrider is weak to Plasma damage which is your best shot at defeating it. As the name suggests, it’s especially strong against Acid damage, so avoid using this. It shouldn’t be too difficult to take it down if you’re above the recommended Level 20.
Talk to Garrokah
Garrokah wants to save his squad from an ambush they’ve been keeping an eye on and will ask Aloy to follow him. Despite her suspicions, you should. On the way, two Stalkers will jump out at you, though they should be pretty easy to take down.
When you arrive, there’s no ambush. Garrokah is confused and does not remember stabbing his daughter, as well as forgetting who Aloy is. It becomes clear that he has memory troubles.
The squad has been dead for years, and one of the Memorial Markers is missing, which Garrokah would like Aloy’s help to find.
Follow the Tracks
Again, highlight the tracks with your Focus and you can follow them to find the missing Memorial Marker.
Kill the Clamberjaws
You’ll have to kill the Clamberjaws before you can retrieve the Memorial marker.
They’re weak against Purgewater damage, so keep using that if possible. Fire and Plasma damage will not do much to them, as they’re strong against this.
Retrieve the Memorial Marker
You can now search the scrap piles to find the Memorial Marker. Garrokah will return to his daughter and explain himself, and they embrace as he apologizes.