Samurai Warriors 4-II - PlayStation 4 Revamped battle, action, and character development systems based on consumer demand. Highly challenging and richly rewarding Endless Castle Mode! Survive and ascend the increasingly difficult Castle! For the first time in franchise history, General Naomasa Ii will be a playable character! Smarter AI - enemy officers have more attack/action patterns and are more difficult to defeat. Ability to merge weapons to create your own, more powerful weapon.