Sub-PAC Guide for Arknights: Endfield. See unlock conditions, Sub-PAC locations, recommended blueprints, how to supply power, and Main PAC differences in AKEF.
Table of Contents
Unlock Conditions for Sub-PACs
Unlock Conditions by Location
| Location | Unlock Requirements |
| Valley Pass | Chapter 1 Process I "Building an Outpost" |
| Originium Science Park | Chapter 1 Process III "Down the Hill" |
| Power Plateau | Chapter 1 Process IV "Mysterious Signal" |
| Jingyu Valley | Chapter 2 Process II "A Breeze Away" |
To unlock Sub-PACs in Endfield, you must clear specific Key Missions (subquests). These missions appear naturally as you advance the main story, so keep a close eye on your mission list to ensure you don't miss them.
Sub-PAC Locations
Sub-PAC Locations in Valley IV
| Valley Pass | Originium Science Park | Power Plateau |
  |  |  |
You can find the Valley IV Sub-PACs spread across three main zones: Valley Pass, Originium Science Park, and Power Plateau.
Sub-PAC Location in Wuling
| Jingyu Valley |
 |
The Wuling Sub-PAC is situated in Jingyu Valley. Since the Main PAC is in Wuling City, this location is ideal for producing Wuling-exclusive items.
Recommended Blueprints for Sub-PACs
Self-Sustaining Production Lines
For your Sub-PACs, it is best to build self-sustaining production lines. Good examples include automated battery production, power generation via Thermal Banks, or infinite plant production.
Focus on Manufacturing at the Main PAC
Once you have secured a stable power supply and increased your max power output, shift your attention elsewhere. Use the Main PAC to manufacture high-priority items needed for missions, combat, and boosting your Valley Stock Bills.
Recommended Blueprint Codes for Sub-PACs
*Click the Green Button to Copy the Code. Blueprint Codes are case-sensitive
| Power Generation Line | Blueprint Code |
 Originium Ore Power Generation | EFO01Ue379uUu2OO71a8 EFO0172UAa7E9i5AO0Ai |
 LC Valley Battery Power Generation | EFO01Ue379uUu2O2U71a8 EFO018IeoO78701A3Ui73 EFO01U4Ai0U26eOEi7Oa8 EFO01u1IoEu6480UAoOU |
 SC Valley Battery Power Generation | EFO01u8U32AuA603aAoOU EFO01o0834oaOu63EIieO |
 Infinite Farm (Buckflower, Citrome, Aketine, Sandleaf) | EFO01ouiI5eoea6EoI2eO EFO0172UAa7E9i55UO0Ai |
Higher-tier batteries generate power more efficiently, so be sure to upgrade your production lines as they become available.
How to Supply Power to Areas Without a PAC
Originium Science Park Power Route
You can supply power to the Originium Science Park from either the Hub Base (Main PAC) or a Sub-PAC. If you draw power from the Hub Base, you must plan carefully, as the route requires passing through the Hub Base and the AIC Research Center.
Recommended Route Over the Hub Base
There are multiple routes to get power to the Originium Science Park, but we recommend routing cables over the rooftop of the Hub Base. Use the outdoor elevator to connect the power cable to a high point.
Drawing Power From a Sub-PAC
To get power across the cliff to the Originium Science Park from a Sub-PAC, you will need to utilize ziplines or relay poles to bridge the gap effectively.
Origin Lodespring Power Route
The Origin Lodespring requires power from the adjacent Originium Science Park or Power Plateau. Since it is more efficient to connect it as you progress through the story, we recommend drawing power from the Originium Science Park.
Aburrey Quarry Power Route
There is no Sub-PAC at Aburrey Quarry. Therefore, you must draw power from the PAC in the Hub Base. The recommended route runs from the Worker Dorms area to the Mountain Side Trail.
How to Move Sub-PACs
Move PAC via Protocol Management
You can move a PAC by approaching it and selecting "Protocol Management" → "Move." Moving PACs can help optimize and expand the space available for building production lines.
Utilize Top View
| Unlock Condition | Main Story "Paving the Way" |
|---|
When you move a PAC, you may need to reconsider your entire production line layout. The top view is highly recommended as it allows you to see the entire area at once.
| Tip! | In the top view, you can also move facilities by long-pressing them. |
|---|
Main PAC vs. Sub-PAC Differences
Shared Functions & Capabilities
Sub-PACs function almost identically to the Main PAC. You can build automated production lines and supply power to the surrounding area without any restrictions.
Area Size and Depot Bus
The primary differences are the size of the AIC Area and the placement of the Depot Bus. When fully upgraded, the buildable area of the Main PAC is larger than that of a Sub-PAC.
Depot Bus Placement
Regarding the Depot Bus, the Main PAC features them on two sides of the AIC Area, whereas the Sub-PAC only has them located on one side.
Related Endfield AIC Factory Articles
Back to Top PageHow to Share and Create Blueprints
Blueprint Code List
How to Create Blueprints
How To Share BlueprintsBasic AIC Factory Operations
  Basic AIC Controls |  Clogged Transport Belts |  Fixing AIC Facility Issues |
 Repair Broken Facilities |  How to Craft Bombs |  Best Zipline Locations and Routes |
 Sub-PAC Locations and Uses |
Reroll Tier List
How to Reroll
Best Characters Tier List
Early Game Guide
Redeem Codes List
Best Team Comps
Points of No Return
Linking GRYPHLINE Account
How to Add Friends
Daily Tasks To Do
Authority Level Guide
Interactive Map
