External Detonation Complete Guide

Grenade Puzzle Solution, Bar Gap Mechanics, Switch Trigger & Step-by-Step Walkthrough

Last updated: 2026-02-25

Complete walkthrough for Arknights Endfield's External Detonation Protocol Space puzzle from Delver of the Cryptic. Learn how to use grenades to reach enclosed areas by lobbing them through gaps between bars. Includes detailed screenshots, step-by-step instructions, FAQ, and interactive checklist for this permanent Protocol Space challenge.

⚡ TL;DR - Quick Solution

1. Starting area: Collect rewards in the starting area
2. Grenade solution: Lob grenade between bars to trigger the switch
3. Collect rewards: Grab rewards from the activated area

What Is External Detonation?

External Detonation is a Protocol Space challenge introduced in Arknights Endfield's Delver of the Cryptic update. It's a puzzle-based challenge where you must use grenade mechanics to trigger switches and access rewards.

Unlike combat-focused Protocol Spaces, External Detonation tests your understanding of grenade mechanics. The key puzzle involves lobbing grenades through gaps between bars to trigger a switch on the other side.

Key Points

• Puzzle-focused challenge using grenade mechanics
• Key technique: Lob grenades through gaps between bars
• Grenade explosion triggers the switch
• Strategic grenade placement is essential
• First clear rewards include Oroberyls and materials

Step 1: Starting Area

Begin by exploring the starting area of External Detonation. Collect any rewards available in this area before proceeding to solve the main puzzle.

The starting area with initial rewards

The Solution: Collect the rewards in the starting area. Then proceed to find the main puzzle area with the bars.

Step 2: Grenade Solution - Lob Through Bars

The key puzzle in External Detonation involves a switch that's enclosed behind bars. You need to use the grenade mechanic to trigger it.

External Detonation grenade solution - lob between bars

Find the gap between the bars and lob a grenade through to trigger the switch

The Solution: Look for a gap or opening between bars in the area. Position yourself appropriately and lob a grenade through the gap. The grenade will explode on the other side and trigger the switch, activating the area.

Grenade Mechanic

The key is to aim for the gap between bars. Your grenade needs to pass through the opening and explode on the other side to trigger the switch.

Step 3: Collect Rewards

After triggering the switch with your grenade, the area is now accessible. Collect your rewards to complete the challenge.

Collect your rewards from the activated area

The Solution: Once the switch is triggered, explore the now-accessible area to collect your rewards. Look for any additional rewards scattered throughout.

Completion

Congratulations! You've completed External Detonation. Collect all available rewards for maximum gains.

Quick Reference Checklist

Frequently Asked Questions

How do I solve the grenade puzzle in External Detonation?

To solve the grenade puzzle in External Detonation, find the gap between the bars and lob a grenade through. The grenade explosion will trigger the switch on the other side, allowing you to access the area and collect your rewards.

What is External Detonation in Arknights Endfield?

External Detonation is a Protocol Space challenge included in the Delver of the Cryptic update. It features a puzzle mechanic where you must use grenades to trigger switches by lobbing them through gaps between bars.

Do I need to fight enemies in External Detonation?

External Detonation focuses on puzzle-solving using the grenade mechanics. The challenge requires strategic use of grenades to trigger switches rather than combat.

What rewards do I get for completing External Detonation?

Completing External Detonation provides first-clear rewards including Oroberyls (premium currency), Credits, and various upgrade materials.

Is External Detonation part of Delver of the Cryptic?

Yes, External Detonation is one of the Protocol Space challenges included in the Delver of the Cryptic permanent content update in Arknights Endfield.