Fallout 4
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Table of contents

Complete Guide to "Cleansing the Commonwealth" Quest in Fallout 4

Introduction

In Fallout 4, "Cleansing the Commonwealth" is a quest associated with the Brotherhood of Steel faction. This quest not only immerses players in the game's post-apocalyptic storyline but also provides engaging combat challenges. In this guide, we'll walk you through each step of the quest in detail to ensure that you can complete it successfully and efficiently.

Step-by-Step Walkthrough

  • Start the Quest

    • To begin the "Cleansing the Commonwealth" quest, you must be at least level 20 and have previously joined or agreed to work with the Brotherhood of Steel.
    • Speak to Paladin Danse at The Cambridge Police Station to receive your objective. He will provide you with a holotape that details the location of the quest target.
  • Head to the Quest Location

    • Using your map, locate ArcJet Systems, which is your primary destination for this quest.
      • Note that this area is heavily infested with hostile enemies, including feral ghouls and Synths.
    • Travel to ArcJet Systems, ensuring you are well-prepared with ample ammunition, health supplies, and armor.
  • Navigating ArcJet Systems

    • Upon entering ArcJet Systems, you will want to head downstairs using the main staircase.
      • Keep your weapon drawn, as you may encounter enemies immediately.
    • Be on the lookout for hostile Synths. Use stealth whenever possible to pick them off silently.
      • Make use of cover and try to flank the enemies for a tactical advantage.
  • Activate Security Protocols

    • Make your way to the main computer terminal. It is situated in the control room on the lower level of the facility.
      • You will need to hack the terminal, so ensure you have appropriate skill levels or pick a lock if necessary.
    • Once at the terminal, input the commands to activate the security protocols. This will provide you with backup support against hostile threats.
  • Combat Encounter

    • After activating the terminal, prepare for a wave of enemies. Use grenades, mines, or any explosive equipment to control the crowd.
      • Work with your Brotherhood allies if you are still with Danse, as they can aid in combat.
    • Focus on eliminating Synths and avoid getting overwhelmed.
  • Objectives and Findings

    • After clearing the area, search for key items such as the ArcJet holotape. This will aid in your next objectives.
      • Always check desks and lockers for additional loot and ammunition.
    • The holotape will give you critical intel regarding the Institute, the main antagonist organization in the game.
  • Completing the Quest

    • Once you gather all required items and complete your objectives within ArcJet Systems, return to Paladin Danse at The Cambridge Police Station.
      • Interact with him to report your findings and conclude the quest.
    • You will receive experience points and may unlock additional Brotherhood missions depending on your choices.

Conclusion

Completing the "Cleansing the Commonwealth" quest is a rewarding experience that immerses you into the struggles and triumphs of the Brotherhood of Steel. By following this guide step-by-step, you can streamline your journey through ArcJet Systems and emerge victorious in your confrontation with the Commonwealth's threats. Happy gaming!