In Batman: Arkham Knight, the Dark Knight faces numerous threats across a crumbling Gotham City, but some of the most meaningful challenges involve rescuing those who protect the public. The Line of Duty side-mission tasks players with tracking down and saving the missing members of Gotham's fire department who have been taken hostage by various criminal factions. This comprehensive guide provides tactical strategies and structural insights to help you locate every crew member and complete the storyline efficiently.

Understanding the Grid and Investigation Methods

Locating the captured firefighters requires a systematic approach to exploration rather than relying on standard map markers. Players can utilize the Batmobile's advanced tracking systems and the cowl's Detective Mode to scan high-density areas for hostile gatherings. Paying close attention to localized radio chatter from thugs often reveals nearby hostage situations before they appear on your radar.

The mission progresses dynamically as you clear out distinct districts, meaning some firefighters only become accessible as additional islands unlock during the main narrative. It is highly recommended to balance your exploration with main campaign progression to ensure all territories are reachable. Taking the time to secure high vantage points across the skyline will make spotting distant enemy groups much easier.

Tactical Breakdown for Hostage Situations

Each rescue encounter functions as a unique combat or predator puzzle that tests your mastery of Batman's expansive gadget arsenal. Criminal groups guarding the hostages often employ advanced countermeasures, including firearms, brute enforcers, and optical camouflage. Prioritizing high-threat targets using silent takedowns will significantly minimize the risk of civilian casualties during the ensuing chaos.

When dealing with heavily armed squads, utilizing environmental hazards and the Fear Multi-Takedown mechanic can instantly neutralize the majority of opposition. For players looking to maximize their efficiency, accessing a comprehensive can provide exact positioning data for the trickiest encounters. Always scan the immediate perimeter for hidden entry points like floor grates or breakable walls to gain a tactical advantage before initiating combat.

The Final Confrontation and Chief Underhill

After successfully securing the initial groups of crew members scattered across the city, the true origin of their disappearance begins to surface. The final phase of the investigation directs the Caped Crusader to a heavily fortified compound where the remaining emergency personnel are being held under maximum security. This encounter demands a flawless execution of both stealth and open combat to overcome the final wave of militia forces.

Unlocking the conclusion of this side-mission reveals a complex narrative twist involving the leadership of Station 17 and their desperate measures to protect Gotham. Safely escorting the remaining survivors back to the authorities rewards players with substantial upgrade points to enhance the batsuit. Completing this objective is essential for achieving the full knightfall protocol ending and restoring order to the metropolitan area.