Thanks, old friendG 10

*MISSABLE ACHIEVEMENT*

The best way to go about this achievement to be sure you don't miss anything is to head back to the Batcave at every opportunity. Any time a cutscene plays or any major story point occurs, travel to the Batcave if you're able to. Talk to Alfred again and again until he begins repeating himself without the camera cutting to him. Once you've heard the last of Alfred's necessary musings, the achievement will pop.