Gekokujo is a mod for Mount and Blade Warband set in the Sengoku period of Japan. The name is a term often translated as "the low-ranked taking over from the high" and was chosen because it was a running theme during that era: Oda Nobunaga descended from a clan of deputies to the nominal governor of their province, but the Oda usurped them and toppled their neighbors; Toyotomi Hideyoshi began his career as a cook and sandal bearer and ended up the ruler of Japan; Tokugawa Ieyasu was an upstart who probably fabricated a claim of descent from the Minamoto clan--the only ones allowed to be granted the title of Shogun. As a player of Gekokujo, you will start from nothing and attempt to gain control of the entire country, making the title fitting.
Warring States era of Japan (Sengoku Jidai) is one of the most underrated settings for any war games, this mod does justice to it.
The entire mod feels like a whole new game, reminds me a lot of Total War: Shogun 2, the mod itself is historically accurate (correct me if I'm wrong) taking place before Oda Nobunaga's demise,the Imagawas have already been wiped out, thought it would be cool too see okehazama in this mod. But the mod also lacks the addition of Shinobi but i'm sure it will be added in future updates, overall if you love samurai and Japanese's history you'll love this mod!