Which Assassin's Creed game first introduced the series' iconic hidden blade in its 2007 debut?

The 2007 game Assassin's Creed first introduced the series' iconic hidden blade.

The hidden blade is a concealed wrist-mounted weapon used by members of the Assassin Brotherhood for close-range attacks. Altaïr uses it throughout the first game, and it quickly became one of the franchise's most recognizable symbols.

The weapon is presented as part of the Brotherhood's equipment and traditions rather than as an ordinary sword or dagger. Later games expand its design and uses, adding variations such as poisoned blades, dual hidden blades, and mechanisms that allow the weapon to retract more safely.

Although earlier historical periods appear in later prequel stories such as Origins, the first released Assassin's Creed game established the hidden blade as a defining piece of Assassin equipment. Its recurring appearance links different eras of the fictional organization.