Assassin's Creed Revelations is the final episode in the trilogy of games that follows the story of Ezio which began in Assassin's Creed II. The game is a direct sequel to Assassin's Creed Brotherhood and concludes both his, and his predecessor Altaïr's adventures.
Ubisoft has put up Assassin's Creed Revelations, which was released earlier this year, for sale at a 50% discount on Steam, perhaps as an enticement for the game's newly released DLC, The Lost Archive.
With the discount, the normally priced $49.99 game can be purchased for $24.99, and is available for both American and international gamers. Unfortunately, ANZAC gamers will have to pay much steeper $45 for the game unless they can get a friend to gift it to them.
You can pick up the game directly on Steam before the sale ends.