Arknights Endfield is built around base management as much as it is about combat. Your long-term progress depends heavily on how well you develop your headquarters and connected systems. Two of the most important facilities you will interact with early and mid-game are the Control Nexus and the Growth Chamber. Upgrading the Control Nexus not only unlocks new gameplay systems but also acts as the main gatekeeper for base expansion. The Growth Chamber, on the other hand, is a powerful progression feature that boosts operator development and resource efficiency. This guide explains how both systems work, how to upgrade them, and how to avoid common progression mistakes.
The Control Nexus functions as the central command unit of your base. Almost every major feature is locked behind its upgrade level. Think of it as the brain of your operation. When you raise its level, you gain access to new buildings, higher production caps, and advanced research paths.
Key functions of the Control Nexus include:
- Unlocking additional base zones
- Increasing operator deployment limits
- Allowing higher-tier facility upgrades
- Enabling advanced systems like the Growth Chamber
Because of this, the Control Nexus should always be one of your top upgrade priorities. Ignoring it will eventually stall your overall progression, no matter how strong your combat team becomes.
Requirements To Upgrade The Control Nexus
Upgrading the Control Nexus is not as simple as spending one resource. Each level has layered requirements that test your overall base development. Before starting an upgrade, make sure you meet all conditions.
Common upgrade requirements include:
- Specific materials gathered from exploration zones
- Processed resources produced in your base
- Minimum levels on supporting facilities
- Completion of certain main or side objectives
As you progress, the game encourages balanced growth. If your factories, power systems, or logistics buildings are underdeveloped, the Control Nexus upgrade will be locked until those gaps are fixed.
Step By Step Process To Upgrade The Control Nexus
To upgrade the Control Nexus efficiently, follow a structured approach. This prevents wasted time and resource shortages.
Start by checking the Nexus upgrade screen to see exact requirements. Next, prioritize production buildings that generate required materials. Assign operators with suitable traits to boost output and reduce processing time. Once materials are ready, confirm that all prerequisite buildings meet their level requirements. Finally, initiate the upgrade and prepare for a temporary strain on your power and resource grid.
Planning upgrades during downtime, such as after major combat missions, helps maintain smooth progression.
How To Unlock The Growth Chamber
The Growth Chamber is not available at the start of the game. It is directly tied to your Control Nexus level and story progression. Once your Control Nexus reaches a specific threshold, the Growth Chamber blueprint becomes available.
To unlock it, you must:
- Upgrade the Control Nexus to the required level
- Complete the related main story objective
- Build any prerequisite research or support facilities
- Allocate enough power capacity to sustain it
After construction, the Growth Chamber becomes a permanent part of your base and opens new ways to strengthen your operators.
What The Growth Chamber Is Used For
The Growth Chamber focuses on long-term operator enhancement. Instead of instant power boosts, it provides steady growth that compounds over time. This makes it extremely valuable for players planning ahead.
Main benefits of the Growth Chamber include:
- Passive stat growth for assigned operators
- Improved efficiency for certain resource tasks
- Synergy bonuses with other advanced facilities
- Reduced training or recovery downtime
Using the Growth Chamber correctly can significantly reduce grind in later stages of the game.
