The Core AIC Area serves as the central hub for factory operations in Arknights: Endfield, where players known as Endmins build essential factory stations and distribute electricity across various regions. Therefore, optimizing this area is crucial for gameplay success.
Initially, the space designated for the Core AIC Area may seem constrained; however, players can later expand it to accommodate the growing demands of their Endfield base. This guide details the steps necessary to expand the Core AIC Area effectively, allowing for broader operational capabilities.
Steps to Expand Core AIC Area in Arknights: Endfield

To initiate the expansion of the Core AIC Area in Arknights: Endfield, players need to complete the AIC Steward quest. Once completed, an AIC Steward will appear in the southeastern corner of your Core AIC Area.
Engaging with the AIC Steward will grant access to the area upgrade interface. Players are presented with two options: expanding the Core AIC Area or constructing a Depot Bus. It is essential to note that building a Depot Bus necessitates prior area expansion, making these upgrades interdependent.

Below are the costs associated with all upgrades for the Core AIC Area:
| Upgrade | Valley Stock Bill Cost |
|---|---|
| Area Expansion I | 20k |
| Area Expansion II | 160k |
| Depot Bus I | 5k |
| Depot Bus II | 20k |
| Depot Bus III | 40k |
| Depot Bus IV | 80k |
| Depot Bus V | 160k |
| Depot Bus VI | 320k |
Understanding the AIC Steward Quest in Arknights: Endfield

As players progress through the main storyline and enhance their factory capabilities in Arknights: Endfield, the AIC Steward quest becomes available in their mission list.

To trigger the AIC Steward quest, access your Baker message and navigate to the Tasks tab. Look for a message from Fiona, the Comms Officer, regarding the AIC Steward developed at the Endfield R&D Center.
Completing this task merely requires a conversation with the AIC Steward, facilitating an introduction to the mechanisms available for expanding the Core AIC Area.
Utilizing the Depot Bus in Arknights: Endfield

Once engaged with the AIC Steward, players can unlock the Depot Bus feature in the Power section of the AIC Factory Plan page. This feature activates both the Depot Loader and Depot Unloader.

The Depot Loader and Depot Unloader work together, with the Loader responsible for inputting items into the depot and the Unloader for extracting them. This dual functionality allows players to manage inventory more efficiently, thereby reducing strain on central factory operations and enabling a smoother process.
In essence, the introduction of the Depot Bus empowers Endmins to decentralize storage and logistics, promoting improved gameplay strategies.
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