In Assassin's Creed (2007), Altaïr Ibn-La'Ahad's story begins in 1191.
The game is set during the Third Crusade, a period of conflict in the Holy Land involving forces connected with the Christian and Muslim worlds. Altaïr is an Assassin operating under the leadership of Al Mualim, and his missions take him through several cities, including Masyaf, Damascus, Acre, and Jerusalem.
The year 1191 places the fictional events alongside real historical figures and tensions associated with the Crusades. Although the game uses historical locations and people, its secret Assassin–Templar conflict is a fictionalized part of the setting.
Players sometimes confuse the game's date with the year of the Third Crusade's beginning in 1189 or with later Assassin's Creed stories set in different centuries. Altaïr's campaign specifically takes place in 1191.