合戦!!にんじゃ村

Take charge as the head of a leading ninja clan and rewrite the history of feudal Japan. Rally followers, train ninjas in 16th‑century warfare, assign them to infantry, cavalry, and other units, and use matchlock guns to outwit rivals.

Between battles, generate funds by producing goods for travelers, upgrade gear and skills, and pursue alliances with legendary generals on the road to unification. This title from Kairosoft offers both free-to-play and paid versions on the Chrome extension page.