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Where to find the maintenance key in Test Station Elm in Horizon Forbidden West

Where's the janitor?

During Horizon Forbidden West's main quest Seeds of the Past, Aloy will scour the Test Station Elm with her newest companion Alva. Together, the two brainiacs must solve the puzzles inside to reach the information they are looking for. One piece, in particular, can be especially elusive, the maintenance key.

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Where the Maintenance Bypass Key is hiding

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After entering the Greenhouse through a vent, players will have a couple of levels of this inner chamber to explore. First head down to the lowest floor, and head to the far right corner where a battery storage container is. Pull this out of the wall and check in the space behind. This is where the maintenance bypass key will be.

Players can then take the key over to the door to unlock it. Just take the yellow ladder back up to the level Aloy and Alva came from. The door is a large heavy metal door with the key module beside it. It will be across from where the ladder is.

For more Horizon Forbidden West content, be sure to check out All Black Box Locations in Horizon Forbidden West on Pro Game Guides.


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Author
Image of India MacGregor
India MacGregor
India (Clay) MacGregor is a writer and artist, creating their own comic book series Harkøth's Blood. They are a lover of high fantasy in all mediums. India originally fell in love with games like Dungeons & Dragons, Morrowind, and Dragon Age in childhood. In 2018 they graduated from Full Sail University with their BFA in Creative Writing for Entertainment and have been writing ever since.
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