Hi Otter Ruin, Bungie is aware of this achievement / trophy not unlocking correctly for all users and is currently investigating. [quote] [b]Student of History Trophy/Achievement[/b] We are investigating player reports that the Student of History Trophy/Achievement is not functioning properly. We recommend players follow the troubleshooting steps listed within this [url=https://www.bungie.net/7_A-Trophy-or-an-Achievement-did-not-unlock-in-the-g/en/Help/Article/12242]Help Article[/url]. [/quote] https://www.bungie.net/en/Forum/Post/213318340/0/0