Hidden Blade

"The hidden blade has been a constant companion of ours over the years. Some would say it defines us - and they would not be entirely wrong. Many of our successes would not have been possible without it."

- Altaïr Ibn-La'Ahad's Codex, Page 13.

The iconic weapon of the Assassins, the Hidden Blade is a weapon used for both stealth assassinations and regular combat. It is their most versatile weapon, with multiple upgrades and forms of use.

Third Crusade
The Assassin Altaïr Ibn-La'Ahad initially wielded a hidden blade, however, due to his failure in retrieving the Apple of Eden, and his breaking of all three tenets of the Creed, he was demoted to a Novice by Al Mualim, and was stripped of his weapons. At his first promotion to Rank 2, however, he earned back his hidden blade, along with his sword.

Aside from assassinations, the hidden blade was also used in a variety of investigations. For missions given by informants, wherein Altaïr was asked to stealthily assassinate a number of targets, he could only make use of his hidden blade or throwing knives in order to remain undetected. Additionally, after successfully interrogating a target, Altaïr was forced to kill them so they could not reveal their plans, and did so by burying his hidden blade into their stomach.

Although the blade was used mainly for stealth, it could also be used in open conflict, but only for countering enemy attacks.

Renaissance
In his own time as an Assassin, Giovanni Auditore also wielded a hidden blade, albeit one that had been adapted to the change of the times. As outlined in the Codex, the revised blade had been designed by Altaïr so that the Assassins, who he intended to go undercover, could not be identified by their lack of a ring finger.

Furthermore, the mechanism did not require a wrist "flick" to extend the blade, thus the user could retract the blade without any wrist or hand movement. Additionally, as pictured, the weapon could be used with a clenched fist, although Giovanni is one of the few known Assassins to use it in that manner.

While there is a rotating wheel atop the rear portion of the mechanism's housing (one which turns upon releasing or retracting the blade), its function has not been identified, and there are no known schematics or explanations for the mechanism.

Ezio Auditore inherited the hidden blade from his father, along with his Assassin's robe, the night before the Auditore execution. However, the blade was broken due to Giovanni's last fight in Rome against Rodrigo Borgia and his men, thus Paola suggested that Ezio ask Leonardo da Vinci to repair it. Leonardo was able to do so, with the aid of the schematics detailed in the Codex.

Through other Codex pages, Leonardo was able to provide Ezio with a variety of upgrades (detailed below), including a second hidden blade. Ezio made use of these blades for the majority of his assassinations, and was also able to wield them in battle.

Rome
"Now I can kill double the guards."

- Ezio Auditore, regarding the secondary hidden blade.

Though Ezio possessed the same two hidden blades until 1499, during the Fall of Monteriggioni, he lost most of his weapons, and was only able to salvage the blade and bracer of his father. Upon his arrival in Rome, he was equipped with a single hidden blade, though its bracer had been replaced, courtesy of Niccolò Machiavelli. Later on, however, Leonardo da Vinci was again able to reconstruct a secondary hidden blade for him, with Ezio providing him with the money necessary for the materials.

Aside from using them in combat, Ezio also made use of his hidden blade to unlock the entrances of certain Lairs of Romulus, and mechanisms within the Temple of Pythagoras.

Additionally, Ezio's Assassin recruits were each equipped with a single hidden blade, as the right to use two hidden blades was only reserved for the most trusted of Assassins, or those who had earned the rank of Master Assassin. However, upon reaching the rank of Assassino, the apprentice was given a hidden blade with a bracer much like Ezio's. The apprentices were capable of all of the standard assassination techniques.

Modern Times
During the escape from the Assassin Hideout, Desmond Miles obtained a hidden blade and bracer that was almost identical to Ezio's hidden blade. He later used that hidden blade to fend off the Abstergo guards who had come to capture him.

Later on, upon traveling to Monteriggioni, Desmond began using a bare hidden blade without a bracer, making it less visible on his arm. Also, much as Ezio had once done, he used it to operate a mechanism in the tunnels underneath the Sanctuary.

Additionally, in the Animus Virtual Training Program developed by Rebecca Crane, Desmond was given the chance to hone his skills with the hidden blade. Such challenges included Stealth Assassinations and Flawless Kill Streaks using only the hidden blade.

Third Crusade
As it was mainly used for stealth assassinations, the hidden blade could only be used in combat under certain conditions, and could not block any attack. Altaïr was only able to assassinate a guard who had fallen on the ground (due to a grab-break, counter or grab) or had become momentarily distracted.

Additionally, Altaïr could use the hidden blade in a counter-attack; though the time frame was extremely small, especially in comparison to that of the sword and the short blade. Successfully intercepting an enemy attack enabled one of several different – and always lethal – counter-attacks, in which Altaïr stabbed his opponent in the chest, head, abdomen, foot, base of the skull, or spine.

Renaissance
The hidden blades eventually became vastly more useful in combat due to several upgrades. They could be used offensively, allowing Ezio to block attacks with them as any other weapon. The blades were a fast but low damage weapon, making them useful for suppressing enemy attacks.

Unlike other weapons, every counter-attack with the hidden blades resulted an instant kill, with only a narrow timing window as a disadvantage. Unlike the sword or the short blade, the hidden blades could counter attacks from Brutes, Seekers and Papal guards.

The hidden blade also gave Ezio more freedom in movement than any other weapon. For example, Ezio could easily strafe a 180° arc while in combat, which was barely possible (except from very close range) with the sword or dagger. It also allowed Ezio to quickly flee from a battle without having to take the time to sheathe his weapon.

By his arrival in Rome, Ezio had gained a greater aptitude with the hidden blades. Aside from being able to perform more counter-attacks (due to an increased time window) he was now able to perform multiple instant kills after killing a single guard. To continue this "execution streak," each kill needed to be quickly followed up with another, without Ezio being hit in turn.

Upgrades
Throughout his travels, Ezio would acquire several Codex pages that, upon decryption, detailed upgrades for the hidden blade that were envisioned by Altaïr. These improvements were then built for Ezio by Leonardo da Vinci.

The first of these improvements was the addition of a second hidden blade made from a difficult-to-obtain metal, which was attached to the user's other arm. The second was a metal plate on top of the primary blade's bracer that allowed one to safely deflect enemy attacks with the blades.

Other Codex upgrades included the Poison blade and Pistol. The poison blade allowed Ezio to stab an enemy and leave them to die slowly, granting both a low-profile assassination as well as a distraction to kill or bypass other enemies, while the Pistol allowed Ezio to kill from a distance. Additionally, both blades could be supplemented with various vambraces, which acted as protective armor.

Additionally, upon his arrival in Rome, Leonardo also envisioned further improvements to the hidden blade. The first was the Poison dart launcher, which allowed the use of the poison blade from a distance, and the Hidden Bolt, which fired small Crossbow bolts.

Design

 * Patrice Desilets, the creative director of the game, stated that the addition of a second blade in Assassin's Creed II also had a lucid reason: it's Assassin's Creed II, so there are two blades. ACBSP_2011-04-10_18-35-13-61.png
 * The original design of Ezio's second hidden blade in Assassin's Creed II was displayed as a brown glove, however, in-game, it was replaced with a second bracer. This was reverted in Brotherhood, however, where his second hidden blade included a glove, until a bracer was purchased.
 * It is unknown why the Assassin's Creed: Brotherhood box art, E3 Trailer and other official media depict Ezio with a secondary hidden blade bracer identical to his primary one, as in-game, no such second bracer exists.
 * The second hidden blade is marginally longer than the primary one in Assassin's Creed: Brotherhood, perhaps designed to be a more effective melee weapon to complement the primary hidden blade's design as an assassination tool.

Mechanism

 * In the E3 teaser trailer of Assassin's Creed (as well as in certain concept art), Altaïr can be seen pushing a button to operate his hidden blade. In the actual games, however, no such button or other trigger mechanism exists.
 * In Assassin's Creed: Renaissance and the Assassin's Creed: Brotherhood novel, unleashing the hidden blade required the use of a button, via a certain muscle on the forearm being flexed.
 * In an Assassin's Creed Developer Diary video, Jade Raymond speaks about Altaïr's lack of his ring finger, which is due to the initiation ceremony when a novice is promoted to an Assassin. The ring finger of the left hand is cut off, the hidden blade is installed, and the new born Assassin is ready to complete the missions bestowed upon him or her.
 * The hidden blade is a crafted item in Assassin's Creed: Project Legacy. The materials for its construction are 2 Coils, 1 Iron, 1 Hide and 1 Box of Components (which in turn is crafted using 3 Gears, 3 Screws, 1 Chain and 2 Sprockets).

Others

 * Despite being equipped with a hidden blade, some Assassins (such as Malik Al-Sayf) did not have an amputated finger.
 * The first recorded usage of the hidden blade by an Assassin was by Darius, when he assassinated Xerxes of Persia. However, his ring finger remained intact and he wielded it on his right hand.
 * The hidden blade is used in every major assassination. Even if the player begins by attacking the enemy with a sword, the Assassin will always finish them off with the hidden blade.
 * In Assassins Creed: Bloodlines, if the PlayStation Portable is linked to Assassins Creed II, Altair's hidden blade can be upgraded to be used to block light and heavy attacks.

Gallery
thumb|300px|left|A video guide for the hidden blade in Assassin's Creed. thumb|right|300px|A video guide for the hidden blade in Assassin's Creed II.