Are you a Hogwarts Legacy player looking to explore every secret nook and cranny of the castle? If so, then you’ll want to complete the Secret Quest challenge by unlocking the Headmaster’s upper study room, the highest point in the castle. This guide will show you how to solve the secret quest and find ‘The Key of Admittance’ to open the decorated metal locks on the door near the Trophy Room in the Grand Staircase.
Opening this locked door will allow you to finish one of the three Secret quests in the game. You need all three secret quests to finish one of the challenges. Good luck and consider subscribing to my YT channel and check out all of the Hogwarts Legacy guides there. Thank you