Assassin's Creed Unity is an action-adventure,[2] stealth game played from a third-person perspective and set in an open world environment. The game features a historical recreation of Paris in the late 18th-century at a roughly 1:1 scale. The setting is divided into seven major districts—Le Louvre, Île de la Cité, Le Marais, La Bièvre, Les Invalides, Quartier Latin, and Ventre de Paris—and also includes the town of Versailles, located on the outskirts of Paris. The commune of Saint-Denis (renamed Franciade during the French Revolution) is featured as part of the free Dead Kings expansion pack.
A number of side missions can be found and initiated from within the open world, such as "Paris Stories", which require the player to assist a non-playable character (usually a historical figure) with a minor problem; "Murder Mysteries", in which the player investigates various murder scenes, collecting clues and interrogating witnesses to determine the culprit; and "Nostradamus Enigmas", a series of cryptic riddles that lead the player to different artifacts, which can be used to unlock a special reward. Players can also find a number of collectibles scattered around Paris, including treasure chests, cockades, and artifacts, which provide various rewards, typically in the form of new gear or cosmetic options.
Unity's combat system was greatly refined over previous entries in the series, with fencing being used as an inspiration for the new system. The stealth system also saw several improvements with the addition of new features like manual crouching and the Phantom Blade, a variation of the series' signature Hidden Blade which doubles as a silent crossbow.[4] Furthermore, the linear assassination missions from previous Assassin's Creed games were abandoned in favor of a new "Black Box" design, which offers more freedom to the player in how they go about eliminating their target; the player can explore the environment to find different entry points or possibly helpful distractions, allowing them to choose the approach that best suits them. For navigation, the game introduces new "Free-run up" and "Free-run down" commands to make it easier for the player to scale buildings in either direction, allowing them to make controlled ascents and descents at will.[5] With the updated, larger crowds, new interactions with them are also available. The crowd regularly presents many activities, appearing organically, that the player can choose to engage in or not. Examples include scaring a group of bullies by pulling out a weapon, "settling" a fight between two civilians by killing one of them, or chasing down a thief who has just pick pocketed somebody.[6]
For the first time in the series, the player character, Arno Dorian, presents a unique set of abilities that can be upgraded through a skill tree system, enabling the player to assign points earned through gameplay to improve Arno's skills in stealth, melee, and ranged combat, as well as his health.[7] Players are also able to customise Arno's weapons, armor and equipment to further complement their individual style of play.[8] The quality of these items is indicated by their level, which can be a maximum of 5 (in the case of legendary gear). Players also have a wider selection of weapons available, including swords, axes, spears, rifles, pistols and throwable items, such as smoke bombs.[9] The Dead Kings expansion introduces an additional weapon: the Guillotine Gun—an axe which has been converted into a grenade launcher.
Like most previous Assassin's Creed titles, the game features an in-game economy system, which primarily revolves around the Café Théâtre, a former intelligence gathering front for the Assassins which has fallen into ruin and serves as Arno's main headquarters during the story. The player can renovate the Café by investing in upgrades, which change the building's interior and unlock new rooms, including a secret passage to the Assassins' underground hideout. The Café also functions as a passive business, producing revenue in the background which is deposited in a chest for Arno to collect; the more renovated the Café is, the more money it earns. Players can further increase their income by completing Café-related missions and purchasing additional taverns around Paris.
Unity also introduces cooperative multiplayer to the series. Players can enter taverns, which act as social hubs in the game, where they can see if any of their online friends are playing the game at the current time. If they are currently in a mission, they will appear as a "ghost" version of their character, allowing the player to approach them to request to join their mission. If their request is accepted, both players enter the same game session, where they can continue the mission from the last checkpoint. Up to four players can play together at the same time. Each player takes on the role of Arno, customized within their own game, with other players appearing as their own customized version of Arno and retaining their gear. Many missions and activities are available for cooperative play (all of which can also be attempted solo), but all of the main story missions are single-player only.[6]
There are significant tie-ins with the game's Companion App, a "freemium" click app with limited "direct ties to the overall story of Unity". There are a significant number of treasure chests, assassination targets, and other collectibles that are visible to all players but only accessible to those who have completed certain goals within the app. Following an update in February 2015, this requirement is no longer necessary, meaning players who have downloaded the update, can now collect all the chests in the game without having to play the companion app.[10][11][12]
