Batman Arkham Knight Line Of Duty Mission Guide

24 September 2026 | 162

The Line of Duty quest in Batman: Arkham Knight is one of the most compelling Most Wanted side missions in Gotham City. Players are tasked with tracking down fifteen missing firefighters spread across Bleake Island, Miagani Island, and Founders' Island before rescuing their commander. Completing this questline requires careful navigation, keen observation, and mastery of combat and stealth mechanics.

Locating the Missing Firefighters Across Gotham

Finding every firefighter requires players to explore the three main districts as story progression unlocks new bridges and regions. While the first hostage is marked automatically, subsequent locations must be found using local radio surveillance or visual cues like groups of thugs surrounding a captive. Paying attention to chatter on Gotham's airwaves makes tracking down scattered crews much easier.

The six firefighters on Bleake Island are accessible earlier in the main campaign, whereas those on Miagani and Founders' Islands become available as key story milestones are reached. Certain hostages are hidden behind destructible walls, underground tunnels, or heavily fortified security posts. Exploring every corner of the city ensures you will not miss any isolated crews.

Combat and Stealth Tactics for Rescues

Hostage situations range from simple street brawls to complex predator encounters packed with armed guards, turrets, and brutes. Utilizing Detective Mode before entering a fight helps you identify armed threats, sentry guns, and environmental traps. Initiating fights with a Fear Multi-Takedown or sabotaging weapons with the Disruptor significantly lowers the risk to Batman and the hostages.

In scenarios involving heavy weaponry or automated turrets, using the Remote Hacking Device or Batmobile support provides a crucial tactical advantage. Clearing out guards quietly prevents unnecessary damage and keeps the area under control. Efficient gadget usage ensures fast resolutions to high-risk standoffs.

Rescuing Fire Chief Underhill

Once all fifteen firefighters are safely rescued, the location of Fire Chief Underhill is revealed on Founders' Island. He is held captive by a well-armed group supported by automated sentry guns at a high-elevation construction site. Players must carefully thin out the enemy ranks using environmental hazards, silent takedowns, and gadget hacks.

After neutralizing the remaining guards and securing the chief, a dramatic story revelation unfolds regarding his connection to the incidents. Batman then escorts Underhill back to the Gotham City Police Department lockup to wrap up the investigation. Completing the final step brings closure to the overall mission narrative.

Rewards and Quest Completion

Successfully completing The Line of Duty grants valuable Waynetech upgrade points for every firefighter saved. These points allow players to upgrade Batman's suit, gadgets, and Batmobile combat capabilities for future challenges. Furthermore, locking up the final target brings Gotham closer to full security and contributes toward unlocking the game's true ending.