Mastering the Iron Door Mission in Delta Action: A Complete Strategy Guide

In Delta Action, the Iron Door mission at the Material Room is a crucial late-game activity for securing high-value resources. The challenge lies in planting C4 explosives and defending them during the countdown. This guide provides a step-by-step walkthrough to help players conquer this task efficiently.

1. Planting the C4 Explosives

Approach the iron door and follow the prompt to plant the C4, which takes about 8 seconds. Since you're vulnerable during this phase, clear out nearby enemies beforehand. In team play, assign one member to handle the planting while others defend key positions like corridors and vents. Solo players should use smoke or flash grenades to disrupt enemy sightlines and buy time.

2. Holding Off Enemy Assaults

Once planted, waves of reinforcements will attack from multiple directions. Prioritize eliminating bomb-defusing specialists to prevent mission failure. Enemy patterns include:
- Front corridor: 2-3 assault troops
- Left vent: Snipers or engineers
- Rear maintenance path: Demolition experts
Use area-denial tools like incendiary grenades to control crowds and keep at least one defender close to the C4 at all times to manage threats.

3. Breaching and Looting the Room

As the timer hits 15 seconds, move near the door to finish off remaining foes. After the blast, wait a few seconds to avoid lingering electrical hazards before entering. Inside, thoroughly search all cabinets and safes for rare gear like tactical helmets, intel files (which can unlock side quests), and high-tier currency. This ensures you maximize your haul.

Mission Rewards Overview

Completing this mission yields valuable drops:
- Rare armor and headgear
- Intelligence data from computers
- Random attachments and currency in safes
Additionally, base rewards include 2000 XP, 500 tactical points, and a rare resource pack to boost your progress.

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