
This guide details the methods for acquiring Filler Metal, a rare upgrade material in NieR: Automata. Its scarcity necessitates a strategic approach.
Filler Metal is found randomly within the Factory area. Its spawn rate is low, making farming inefficient. The Factory: Hanger access point, unlocked after progressing through the main story, provides a convenient starting point for searching. Note that spawn locations vary each playthrough. While movement speed boosts can help, reliable farming remains impossible; exploration and collecting all naturally-spawning items is the best strategy.
A more reliable, albeit expensive, method involves purchasing Filler Metal from the Shopkeeper Machine in the Amusement Park. However, this option only unlocks after completing all three playthroughs and obtaining a final ending. Using Chapter Select to revisit the Shopkeeper after completing the game will reveal Filler Metal in its inventory, priced at 11,250 G each. This high cost is offset by its guaranteed availability, making it crucial for acquiring necessary Pod upgrades to overcome high-level enemies.