- Kojiro Sasaki's fourth weapon
The quest for Kojiro's fourth weapon is in his fourth stage in Story mode. In order to unlock his weapon, you must clear 300+ kills as well as kill all Vagabonds (including any that spawn), help the Ieyasu retreat, kill Hideyori, and reach the southeastern gate within ten minutes. To do this, you will need a fast horse and a decently leveled Kojiro. At the begin of the battle, clear all the Vagabonds around Ieyasu. Then, run back and clear the escape point. Wait for two more Vagabonds to appear. Kill one, which will cause at least six more to appear. Kill them, and wait for Hideyori to spawn in the southeastern maze-like area. Find and kill him, then quickly go to the southeastern gate. Musashi will appear in a short intermission sequence. A notice will then appear, showing you the location of your new weapon. Make sure to get your new weapon before killing Musashi.

- Fourth and fifth weapon hints
At the main menu, select the 'Vault Menu' option. Then, go to the 'Weapon Acquisitions' menu. There are hints on obtaining the fourth and fifth weapons, but only for Gracia, Katsuiee Shibata, Kojiro Sasaki, Motochika Chokosokabe, Toshiee Maeda, and Yoshimoto Imagawa. To obtain other characters hints, import the Samurai Warriors 2 disc.

- Achievements
Do the following things to obtain the corresponding Gamerscore points:

25 Points
Kojiro (SW2)/Yoshiteru (XL) Hired	Hire Kojiro in SW2 and Yoshiteru Ashikaga in SW2XL at the Shop and save your game.
Katsuie (SW2)/Joun (XL) Hired	Hire Katsuie in SW2 and Joun Takahashi in SW2XL at the Shop and save your game.
30 Points
Story mode	Clear Kojiro
Story mode	Clear Katsuie
Story mode	Clear Toshiie
Story mode	Clear Gracia
Story mode	Clear Motochika
Story mode	Clear Yoshimoto
35 Points
Mercenary mode	Unification
Mercenary mode	Greatest
50 Points
Okuni Unlocked	Fulfill certain conditions in Sugoroku and save your game.
Masamune Date Unlocked	Clear a certain character's Story mode then save your game.
Tadakatsu Honda Unlocked	Clear a certain character's Story mode then save your game.
Hanzo Hattori Unlocked	Clear a certain character's Story mode then save your game.
Nene Unlocked	Clear a certain character's Story mode then save your game.
Nobunaga Oda Unlocked	Clear a certain character's Story mode then save your game.
Musashi Miyamoto Unlocked	Clear Story mode for all but a certain character and save your game.
Ranmaru Mori Unlocked	Fulfill certain conditions in Survival mode and save your game.
Kenshin Uesugi Unlocked	Clear a certain character's Story mode then save your game.
Nagamasa Azai Unlocked	Clear a certain character's Story mode then save your game.
Kanetsugu Naoe Unlocked	Clear a certain character's Story mode then save your game.
Hideyoshi Toyotomi Unlocked	Clear a certain character's Story mode then save your game.
Magoichi Saika Unlocked	Clear a certain character's Story mode then save your game.
Yoshihiro Shimazu Unlocked	Clear a certain character's Story mode then save your game.
Shingen Takeda Unlocked	Clear a certain character's Story mode then save your game.
Ina Unlocked	Clear a certain character's Story mode then save your game.
Sakon Shima Unlocked	Clear a certain character's Story mode then save your game.
No Unlocked	Clear a certain character's Story mode then save your game.
Keiji Maeda Unlocked	Clear a certain character's Story mode then save your game.

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