These features include the addition of the Japanese voices, an installation to the Memory Stick Duo to decrease load times, and additional characters, such as and, and contents from the unreleased which KOEI announced would not be released outside Japan. The North American, European and Taiwan releases have additional features exclusively to the PSP version of the game. To promote Dynasty Warriors: Strikeforce, the PSP version of Warriors Orochi 2 features the Musou Awakening forms of Zhao Yun, Xiahou Dun and Sun Shang Xiang as usable costumes, unlocked by completing the story modes.