Firearms are a class of long-ranged weapons that launch projectiles at high velocity, through the confined burning of propellents. They began deployment as early as the late Middle Ages.
High Middle Ages
Along with the formulation of a combustible powder that could be made from common ingredients, Altaïr kept the schematics for the hidden gun a secret available to only the Brotherhood's most trusted allies.
In Italy during the Renaissance, another Assassin, Ezio Auditore da Firenze, came into possession of Altaïr's Codex, and showed the pages to Leonardo da Vinci. Leonardo deciphered the instructions, and was able to construct the hidden gun for Ezio's use.
Though firearms were uncommon until the early 16th century, after Cesare Borgia forcibly recruited Leonardo into his employ around 1499, the engineer was made to design a wheel-lock firearm, for use by the Borgia armies.
Cesare's ally, the French Baron Octavian de Valois, received a personalized, golden wheellock firearm from Leonardo, and kept it with him at all times. During the Fall of Monteriggioni, Cesare used this pistol to kill Mario Auditore.
In later years, upon Ezio's travels to Constantinople, he encountered Turkish soldiers using Ottoman Flintlock Rifles, as well as Janissaries who used short pistols. The Assassins of the local guild also made use of firearms to guard the Assassin Dens, ranging from simple rifles, to cannons. The Byzantines had an earlier version of a flamethrower, which they used to deliver Greek Fire. They also had a form of a machine gun similar to Leonardo da Vinci's protoptype. Both of these were later adapted by the Assassins for defending their dens. The Ottomans and Byzntines used bombs for defending the rooftops. Through Piri Reis and through their Chinese neighbours, the Assassins further expanded the use of these bombs, using them to impede, distract, or kill enemies.
During the late 19th and early 20th century, in the Russian Revolution, the Russian Assassin Nikolai Orelov wielded a modern bolt-action Mosin-Nagant rifle alongside the usual weaponry of his time.
- A number of firearms are available in Assassin's Creed: Project Legacy, including the arquebus, .303 SMLE, and M1917 revolver.
- Owning two M1917 revolvers in Project Legacy grants the player the "Akimbo" achievement.