Night Call

This achievement is for listening to all of Ludwig's stories. Ludwig is a ghost that randomly appears in your taxi. I could only get him to appear during a case and not during Free Roam but your experience may be different. These are all his entries in the Passidex:

- You have met Ludwig.
- You saw Ludwig again.
- You heard all his stories.
- Ludwig helped you with your investigation. (Locked)
- Now, you know who Guy Môquet is.
- Now, you know that human zoos exist.
- Now, you know who Little Louis is.
- Now, you know a French president died at the Élysée Palace.
- Now, you know what garum is.
- Now, you know what happened in the rue des Rosiers.
- Now, you know where this ghost comes from.
- Now, you know what happened in the rue des Marmousiers.
- Ludwig helped you with your investigation.
- You thought back to when you met Ludwig. (Locked)

The story parts of the Passidex are impossible to miss unless you don't let him finish. Two entries are not unlocking for me and many others but do not seem tied to the stories. They are noted above. The achievement will pop after Ludwig finishes the last story.