Batman Arkham Knight: how to unlock all characters in free mode [PS4-Xbox One]
Go around with whoever you like.
The guys from the Batman Arkham Videos youtube channel have discovered an incredible glitch that allows you to use any character in the game in Free Roaming mode.
The glitch can be used on both PS4 and Xbox One, the process is quite complex, so much so that one wonders how the hell did they discover the glitch.
Then follow the video step by step (you will need a minimum knowledge of English to better understand how to proceed) and you too can use any character to wander around the map:
... and you have discovered other secrets? Feel free to use the comments or post directly in our forum, we will update the guide with your feedback.