The following are videos of all Boss fights and strategies to defeat them, as well as the endings.

Derrick The Executioner Boss Fight - Boss 1

Onryoki Boss Fight - Boss 2

Hino-enma Boss Fight - Boss 3

Nue Boss Fight - Boss 4

Tachibana Muneshige Boss Fight ("The Spirit Stone Slumbers" mission) - Boss 5

Tachibana Muneshige Boss Fight ("Invitation From The Warrior Of The West" mission) - Boss 6

Great Centipede Boss Fight - Boss 7

Umi-bozu Boss Fight - Boss 8

Marume Nagayoshi Boss Fight ("The Way Of The Warrior: Adept" mission) - Boss 9

Hattori Hanzo Boss Fight ("The Way Of The Ninja: Adept" mission) - Boss 10

Joro-Gumo Boss Fight - Boss 11

Yuki-onna Boss Fight - Boss 12

Onryoki Boss Fight ("Demon Hunting" mission) - Boss 13

Ii Naomasa Boss Fight - Boss 14

Nue Of Mount Hiei Boss Fight and Location - Boss 15

White Tiger Boss Fight - Boss 16

Giant Toad Boss Fight - Boss 17

Marume Nagayoshi Boss Fight ("The Way Of The Warrior: Veteran" mission) - Boss 18

Hattori Hanzo Boss Fight ("The Way Of The Ninja: Veteran" mission) - Boss 19

Onryoki Boss Fight ("Greater Demon Hunting" mission) - Boss 20

Ogress Boss Fight - Boss 21

Honda Tadakatsu Boss Fight - Boss 22

Okatsu Boss Fight - Boss 23

Giant Toad Boss Fight ("The Giant Frog Brawl" mission) - Boss 24

Honda Tadakatsu Boss Fight ("The Champion Of The East" mission) - Boss 25

Saika Magoichi Boss Fight - Boss 26

Hino-enma Boss Fight ("The Silent Crow" mission) - Boss 27

Otani Yoshitsugu Boss Fight - Boss 28

Shima Sakon Boss Fight - Boss 29

Gasha-dokuro Boss Fight - Boss 30

Saika Magoichi Boss Fight ("The Watcher In Darkness" mission) - Boss 31

Ishida Mitsunari Boss Fight - Boss 32

Obsidian Samurai Boss Fight - Boss 33

Oda Nobunaga Boss Fight - Boss 34

Kelley Boss Fight - Boss 35

Yagyu Sekishusai Boss Fight ("Sword Mystic Art Quest") - Boss 36

Ashikaga Yoshiteru Boss Fight ("Dual Swords Mystic Art Quest") - Boss 37

Hozoin Inei Boss Fight ("Spear Mystic Art Quest") - Boss 38

Sakata Kintoki Boss Fight ("Axe Mystic Art Quest") - Boss 39

Shisenin Kosen Boss Fight ("Kusarigama Mystic Art Quest") - Boss 40

Hidden Derrick The Executioner Boss

Yamata-no-Orochi Final Boss Fight and Game Ending

Hundred Eyes Boss Fight (Epilogue Endboss and Second Ending)