For the uninitiated, Nobunaga's Ambition is a long-running franchise that puts the player in the role of a Japanese feudal lord during the Sengoku era of Japan; players can be a fictional or non-fictional lord from the era. The game was one of the first titles to not only deal with territory capture and influence, but also political intrigue in which victories can be won off the battlefield as much as on.
During the Steam free weekend, players can purchase the game at a €10 discount, as well as the downloadable content for €1.99 (usually €2.99) as well.