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In NieR: Automata, some upgrade materials are notoriously harder to come by than others. While you can often obtain these materials by defeating enemies, certain items like Filler Metal only appear as random drops in the game's overworld. The element of randomness means that farming these items involves a bit of luck.
Filler Metal is an essential upgrade material that you'll need to locate in the overworld early in the game, but be ready for a lengthy search. Later on, if you're willing to pay a higher price, you can purchase Filler Metal, which might be the more straightforward option if you have enough in-game currency.
Where To Find Filler Metal In NieR: Automata
Finding Filler Metal involves a deep dive into the Factory, where it can spawn at various locations that change with each visit. Filler Metal is among the rarest items to appear here, making it a challenging find compared to other items you might pick up. To streamline your search, unlock the Factory: Hanger access point after revisiting the factory during the main storyline. This access point serves as an ideal starting spot since it's located further inside the Factory.
You may need to unlock the Factory: Hanger access point again depending on your progress in the story.
While speed boosts can help with navigating the Factory more efficiently, farming Filler Metal remains a hit-or-miss endeavor throughout the game. Your best approach is to thoroughly explore the Factory, collecting every naturally spawned item you encounter. However, purchasing Filler Metal may be the most efficient way to acquire it in larger quantities.
Where To Buy Filler Metal In NieR: Automata
The only vendor selling Filler Metal is the Shopkeeper Machine located in the Amusement Park, but this option becomes available only after you've achieved one of the final endings, requiring you to complete all three playthroughs of the game. Once you've beaten the game, you can use Chapter Select to revisit the Shopkeeper, where Filler Metal will be available for purchase at 11,250 G each.
Although the price may seem high, buying Filler Metal is a more reliable method than repeatedly scouring the Factory. This is especially important because the Pod upgrades requiring Filler Metal are crucial for tackling the game's toughest enemies, which can reach maximum levels.