Koei Tecmo has just released the expansion Ascension for its strategy game Nobunaga’s Ambition Sphere of Influence. The expansion brings new battles from the Sengoku Era and introduces sieges and naval battles, as well as new historical characters. The add-on will have a temporary 20% discount on Steam that will last until November 1st. You can try out the game for free from October 27th to October 30th. The price of the add-on was not included in the PR, so we’ll just have to wait and see what this runs. More information about the add-on is available on the official website.