Combat for the game was meant to be rebuilt, with fencing being used as an inspiration for the new system. In addition to returning weapons from previous games, Assassin's Creed Unityintroduces the Phantom Blade. The Phantom Blade uses the mechanics of a crossbow to fire a silent projectile a great distance, while still serving the same role as the Hidden Blade in previous Assassin's Creed games. Navigation for the game was also overhauled: new "Free-run up" and "Free-run down" commands were added to make it easier for the player to scale buildings in either direction. Additionally, Arno learns new parkour moves throughout the game, but the player can also purchase new skills as well.