|Campaign for Disarmament|
|Enemies||Drones, Cobra Tanks, Deathstroke|
|Appearance||Batman: Arkham Knight|
To ensure no external opponents of the Arkham Knight's Militia attempt to enter Gotham City during its seizure, the Arkham Knight scatters the entire town with mines and threatens to detonate them if anyone but Batman steps foot in the city, explaining why the government or military doesn't intervene. Batman can optionally disable each of these mines, all of them protected by a giant squad of Drones.
Once Deathstroke takes over the Militia, the player can disarm the rest of the mines before beating the other Militia missions. This activates a conversation between Batman and Deathstroke where Batman challenges his rival to a duel at Grand Avenue. Upon going to the designated spot, Batman will lock down the island and hunt Deathstroke down in the Batmobile whilst taking down five Cobra Tanks guarding him. Upon the defeat of the Cobras and his tank, Deathstroke will leap out of his destroyed vehicle, ready to fight, only to get instantly KO'd by Batman. Batman then drives Deathstroke to the GCPD.
This mission can only be completely beaten once Occupy Gotham, Armored and Dangerous, and Own The Roads are completed. Upon the completion of this mission, Drones will be utterly extinct and Deathstroke can be spoken to in GCPD lockup. The Militia is also completely destroyed and never seen again after this mission.
- The title is a play of the term Campaign for Nuclear Disarmament, an organization dedicated to the idea of disabling nuclear weaponry.
- Deathstroke's boss is virtually identical to the Cloudburst boss, except there's only five Cobras instead of six, and the game skips the second phase of the boss (scanning the Cloudburst before locking on and attacking its sides) and goes to the third one (dodging the Cloudburst's fire whilst backing up and shooting it). Deathstroke also possesses a 360-view.
- If the mission is finished, the Militia Commander will be the villain of In From the Cold instead of Deathstroke.