Bomb

"We have many different kinds of bombs here. Some are used tactically to stop chasing guard or manipulate a crowd. Others are used to create diversions, a good way to handle guards before they attack. And of corse we have leathal bombs, they do what they do well..." - Yusuf introducing Ezio to bombs.

Bombs were explosive weapons used by Assassins from as early as the Middle Ages. They could be used for a variety of tactics, including escape, assault and distraction.

Smoke bombs
Smoke bombs were devices that were used more for distraction, rather than attack. Using a powder technology from the Far East, the bomb released a thick, grayish smoke screen for about eight seconds when thrown.

With a smoke bomb device, an Assassin was able to halt any enemy or target, and allow for an easy assassination or escape. This allowed them to strike specific targets, or take down larger groups of enemies without being seen or encountering resistance.

History
Altaïr Ibn-La'Ahad had access to smoke bombs during his quest for the Chalice. He could carry up to five of them at a time, though evidently stopped using them after the events at Solomon's Temple.

Smoke bombs were the only type of bombs that were commonly available to Ezio Auditore up until the 16th century. However, upon traveling to Constantinople during his search for the Seals, he gained access to a far more extensive choice of bombs.

During the Renaissance, smoke bombs were disposable, and had to be purchased for 350 florins each. Ezio could carry a maximum of three at once, which he stored in a non-upgradeable pouch.

Ezio also made use of smoke bombs in the city of Rome, though the actual cloud itself was visually a lot smaller than during the previous century. Smoke bombs were also used by Assassin recruits to stun guards once they reached the rank of Veterano (Veteran).

Hand-held bombs
"Quite little bombs, but effective enough to, say, wreck ships or disperse a camp."

- Leonardo da Vinci.

Hand-held bombs were small explosive devices designed and manufactured by Ezio's close friend, Leonardo da Vinci. Consisting of a small, steel ball filled with sulfur, charcoal and potassium nitrate, they also possessed a small fuse which required lighting before the device could be detonated.

History
These bombs were first used against Cesare Borgia's diehards, who had amassed a sizable military force in the city of Valencia.

During the attack on Valencia, Ezio and Niccolò Machiavelli, each equipped with ten hand-held bombs, brought chaos to Cesare's military forces. They destroyed twelve Borgia ships, and an entire military encampment.

Crafting
Upon traveling to Constantinople, Ezio learned how to create a wide range of bombs, with up to 300 variations. In general, they are divided into three categories: lethal, tactical and diversion.

The Assassins had set up Bomb-crafting stations throughout the cities, in order to be able to craft bombs whenever they came across one.

The bombs could be customized based on their different components; casing, gunpowder layer, and effect layer. The casing affected the bomb's structure, while the gunpowder layer defined the properties of the explosion itself, along with the effect layer providing a further result on detonation; such as the scattering of caltrops.

Ezio was able to collect different resources for each of these bombs, and could craft up to five bombs per pouch, given a single combination and allowed Ezio to carry a maximum of 15 bombs.

Ezio can test a bomb in the VR room to see it's effects without having to waste any bombs.

Assassin's Creed II

 * The smoke bomb pouch is labelled as "small" despite not having any upgrades.
 * In the memory "Cheaters Never Prosper," the three guards and Dante Moro are immune to smoke bombs.
 * While looting Brutes, there is a high chance of obtaining smoke bombs.
 * Smoke bombs are helpful for earning the achievements "No Hitter", "Messer Sandman," and "Sweeper."

Assassin's Creed: Brotherhood

 * The smoke bomb appears as a multiplayer ability.
 * There seems to be a small spark of light when a smoke bomb is deployed, unlike in Assassin's Creed II, where there is no spark.
 * One BAM (Brotherhood Assist Move) has the Assassins throw numerous smoke bombs around Ezio before descending to aid him.
 * The player may lock onto a far-off NPC before pressing the "throw bomb" button to throw the smoke bomb from a distance.
 * Papal guards are immune to the effects of smoke bombs if not taken by surprise, i.e. in combat.
 * Cesare Borgia and pickpockets are completely immune to Smoke Bombs.

Others

 * In Assassin's Creed: Project Legacy, smoke bombs are crafted with gunpowder and sugar.
 * It has been confirmed that enemies in Assassin's Creed: Revelations possess the ability to use smoke bombs.
 * Both smoke bombs and tripwire bombs exist as Multiplayer abilities in Revelations.