SAMURAI WARRIORS UNLOCKABLES
Alternate costumes
Finish Story (Musou) mode with any character, then highlight that person at the character selection screen and press B.
Alternate costumes
Get a 100% completion with all fifteen default characters and a created character. Then, choose the alternate costume for your character, and all your opponents will also wear their alternate costumes.
Four more models
To unlock four more models for a created character, train a new general and get any weapon to an attack rating of 55 by the fourth month. Defeat the Strike Ninja that appears to challenges your school, the complete your training. This may be done up to three more times to unlock a total of four new models for your created character.
Unlock Goemon
Finish Okuni's campaign.
Fight Hattori Hanzo in New Officer Mode
If you have 130+ Jump and you select Combo Training, you may encounter Hanzo. If you defeat him you get the rare item, Provisions (Battle Rations or something similar) which revives you from death once in a battle and restores your health to half. This is the only way to get this item.
Unlock Keichi Maeda
Do Kenshin Uesugi's story mode. When you get to the Siege Of Gifu castle level, a mission will appear saying to eliminate Keiji Maeda. Do not do this. After you complete the level, you will appear in Gifu Castle. When you reach the fourth level, Keiji Maeda and Nobunaga Oda will be waiting for you. Then, kill Nobunaga Oda to complete the level. When you finish the Showdown At Kawankajima level and the credits end, a screen should appear stating "You have unlocked Keiji Maeda.
Fight against Keiji Maeda in New Officer Mode
When creating a new officer, if your attack strength with any weapon is 68 or higher, Keiji may show up to challenge you if you select Swordsmanship (Melee) training. Keiji is very powerful, and the weapon you fight with is random. If you defeat him, you may get the Reach skill for free.
Unlock Kunoichi
Finish Hanzo Hattori's and Shingen's campaigns.
Unlock Magoichi Saika
Finish any character's campaign.
Fight against Magoichi Saika in New Officer mode
If you have a high Ranged Attack (over 65) and select Archery, you may be challenged by Magoichi. If you defeat him, your ranged attack weapon becomes a rifle instead of a bow and arrow.
Unlock Masamune
Finish any two character's campaigns.
Fight against Masamune Date
In new officer mode, constantly do riding. Eventually Masamune Date appears, gets agitated, and decides to fight you.
Unlock Nobunaga Oda
Finish Oichi's, Magoichi's, and Noh's campaigns.
Unlock Noh
Finish Ranmaru Mori's campaign.
Unlock Okuni
Finish Keiji Maeda's campaign.
Unlock Ranmaru Mori
Finish Mitsuhide Akechi's campaign.
Unlock Shingen
Finish Sanada's campaign.
Fight against Lu Bu
Get to the sublevel 30 in the Abyss in survival mode, then go to the blue map square.
Use the Death element on your weapons
Collect all five volumes of "The Book of Five Rings" with a created character.