During the Third Crusade, Conrad frequently clashed with King Richard the Lionheart on various matters. Although they acted civil towards each other in public, it was believed by many that the two secretly plotted against one another.
After the Crusaders took Acre, Conrad's father William had nearly three thousand Saracens executed, infuriating Richard, who had intended to release them in exchange for his own men. Following this incident, Conrad returned to Tyre, while Richard compelled William to remain in Acre. With William there, Richard could prevent Conrad from acting out against him.
As the Assassin Altaïr Ibn-La'Ahad discovered that William plotted against Richard, he believed that it was in order to claim Acre for Conrad. After being struck down by Altaïr, a dying William denied any intentions of aiding Conrad, proclaiming his son to be an unfit ruler.
- Assassin's Creed producer Jade Raymond revealed that they had originally planned to have Conrad in the game. Their research indicated that he wasn't killed in 1191, but William was located in Acre in the same period. In order to maintain the historical accuracy of the project, William was inserted into the game instead.
- William's assassination in the game was also inspired by Conrad's historical death at the hands of Assassins.