Burthorpe Castle is the official residence of Crown Prince Anlaf of the Kingdom of Asgarnia, although Anlaf has been absent from the castle for some time. The castle is in the north-central part of Burthorpe, and its lower levels contain the Burthorpe Games Room. The castle is rarely used, as the Games Room is not popular.
To many players, the castle's main use is to serve as a gateway to Burthorpe since the Games necklace teleports them to the Games Room. It also plays a role in Death Plateau (quest).