Defense Construction is an Exploration Mission questline in Arknights Endfield. This walkthrough will guide you through all objectives of the Defense Construction Exploration Mission.
- Starting Location: Valley IV > Valley Pass
- Quest Giver: Automatically unlocked after completing Exploration Mission – Outpost: OD Project: Refugee Camp I
- Requirement: Complete Exploration Mission – Outpost: OD Project: Refugee Camp I
- Reward: 75 Oroberyl, 300 EXP
- Quest Description: Daniel seems to be troubled by something. You decide to talk to him to understand what bothers him.
Objectives:
- Talk to Daniel
- Defeat the Landbreakers
- Talk to Daniel
- Set up the Early Warning Terminal
- Protect all Command Cores and defeat all enemies (0/21)
- Talk to Daniel
- Complete Auto-Defense in Area Defense
- Protect all Command Cores and defeat all enemies (0/21)
- Check the Early Warning Terminal
- Talk to Daniel
Starting Location: Defense Construction
Complete Exploration Mission – Outpost: OD Project: Refugee Camp I. Then head back to the Refugee Camp and find Daniel.
Talk to Daniel
In the Refugee Camp in the Valley Pass, go and find Daniel and find out what’s going on at the camp.
Defeat the Landbreakers
The camp comes under attack by the Landbreakers. Begin battle and defeat them.
Talk to Daniel
Speak with Daniel again, who has taken off to the tunnels. You can reach them by heading south from the TC point.
Set up the Early Warning Terminal
Activate the terminal in front of you and go through the tutorial for the game’s Tower Defense mode.
Protect all Command Cores and defeat all enemies (0/21)
Press :l3:+ 
once you have your defenses set up to begin the encounter. You must defeat 21 enemies, and you can use your party to get it done faster.
Talk to Daniel
Speak to Daniel next to the Early Warning Terminal.
Complete Auto-Defense in Area Defense
Activate the terminal again and go through the tutorial to learn how to set up Auto-Defenses. These defenses won’t allow the party to participate and will be handled solely by your defenses.
Protect all Command Cores and defeat all enemies (0/21)
Let your defenses defeat the 21 enemies again while you simply wait.
Check the Early Warning Terminal
Activate the Early Warning Terminal again to collect the Stock Bills and learn how they work in the Outpost Management System to give you bonuses.
Talk to Daniel
Speak to Daniel next to the Early Warning Terminal to finish the quest.
You receive 75 Oroberyl and 300 EXP.
This finishes the Defense Construction Exploration Mission in Arknights Endfield.
For all other Quests, refer to the Arknights Endfield Walkthrough.
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