Check your region before paying - https://store.steampowered.com/account/ and make sure it fits Description:
2 exclusive single player maps: Trojan Market and Aqueduct
2 characters for multiplayer:
The officer is Death´s best ally: few have seen him. But even fewer survived after that. Fear is his friend and Death is his servant.
Harlequin is a living nightmare: behind the colorful outfit and insane smile hides the soul of a ruthless killer.
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ABOUT THIS GAME
Live and breathe as Ezio, the legendary Master Assassin against the Templars. He must go to the largest city in Italy, Rome, the center of power, greed and corruption, where he will strike right at the heart of the enemy.

To defeat the corrupt tyrants who have settled there, you need not only strength, but also leadership qualities that Ezio has, going into battle with the Brotherhood of Assassins. Only by fighting side by side will the Assassins defeat their sworn enemies.

For the first time in a series of games, the award-winning multiplayer is introduced, allowing you to choose from a wide range of unique characters with their own weapons and killing techniques, and fight against other players from all over the world.

The time has come to join the Brotherhood.
Key Features
BE A LEGEND: Take control of Ezio, the legendary Assassin, in a brand new adventure spanning over 15 hours.
LEAD AND MANAGE A LEGENDARY BROTHERHOOD: Assemble and customize your guild. Train and raise the level of combat skills of your fighters so that they help you in your travels.
USE SECRET WEAPONS: Eliminate your enemies using tools such as poison darts, parachutes, double hidden blades, a hidden gun and an advanced flying machine.
CONQUER THE HEART OF THE CITY: Use your hard-earned cash to rebuild a dilapidated city. Rally citizens to your nature and unlock new factions and missions.
MULTIPLAYER GAME: A wide variety of characters with unique weapons and killing techniques. With detailed maps and a wide selection of game modes, no two battles will ever be the same.
ADDITIONAL CONTENT:
Animus Project Update #1 - Multiplayer Add-on:

To survive the dangerous narrow streets and layered architecture of the Mont Saint Michel map, and fight in the Advanced Alliance multiplayer mode, Absergo´s recruits need to use their tracking and freerunning skills.
Animus Project Update #2 - Multiplayer Add-on:

The Pienza map features a great free-running area where hunters and targets can easily blend into the crowd and disappear. In the new multiplayer mode "Capture Chests", players are divided into two teams of three people, one of which tries to capture the chests, the second protects them. Also included in the content is the Templar Appreciation, which will reward especially diligent Abstergo killers.
The Disappearance of Da Vinci - Single and Multiplayer Add-on:

After the fall of Borgia, Leonardo da Vinci is kidnapped and Ezio begins a relentless quest to get his friend back. The biggest addition to the award-winning multiplayer game, it includes a new map, new characters and new game modes.