Use the timeline below to browse through their locations if you're missing only one specific checkpoint. You do not need any upgrades for them! In this video I show you how to get each one without buying any skills.
Play through the main story to get access to all of their locations. Completing this mission unlocks the 'Streets of Gotham' trophy / achievement. You must find the locations of all 20 militia checkpoints and destroy the commander's controller.
Own the Roads' is a Most Wanted Side Mission in Batman Arkham Knight.
