First you want to have at least 3 devil elixirs. You must have The Art of The Inferno. (buy at shop) When you get to the 3 dragons get very close to one of the dragons and hit Y+B at the same time. This will inflict damage on the dragon while the fire touches the dragon and then when Ryu shoots it with the fireball. Do this twice and then beat the third dragon with some mad hacking skills. When the Fiend appears back away and wait until after the sweeping motion. Then run and use the jump slash attack on the tentacle. Do this as much as possible until you get hit. When you cut off the first tentacle don't wait to cut the other one off. (You must hurry) You must get both tentacles cut off before the other one grows back. When this is done the fiend will be stunned. Shoot it with as much arrows as possible. It is more effective to shoot a fire ball at it when it is stunned. Next it will spit fireballs out of the it's top. Dodge the fireballs and repeat the slash and shoot method.
Submitted by The White Shadow
The worm boss is a bit tricky, but once you learn his techniques he's quite simple. On this boss you MUST use the wall to your advantage! When he shoots a plasma ball at you just run straight up the wall and do a backflip and he'll never hit you. When he is about to sweep you just run up the wall and do a backflip again and this time in mid-air press Y to do a downward attack. This will hurt him a lot if you use the War-Hammer. Just keep repeating the backflip off the wall and the downward attack and you shouldn't have a problem.
Submitted by Silent Baller
Beat the game once then u play the game again up 2 chapter 13.Its on the second floor in the Muramasas shop. The dark dragon is pretty slow and it doesn't have lots of techniques.
Submitted by Unlabored Flawleesness
When fighting zombies the easiest thing to do is jump towards the zombie and press Y, this will usually cut their head off if not, try it again (only works with Vigoorian Flail and Level 2 Dragon Sword) without the head the zombie can't see you, therefore, you have a much greater chance of not getting hit, plus, it can't do that vicious biting grapple move.
Submitted by ryu hayabusa
If you've played enough you've probably ran into a wall with mysterious looking cracks in the wall. If you've obtained Incendiary Shuriken or the War Hammer you can break these cracks in the wall to reveal a new area of the level. Some levels have you go through them before you can actually reach what's on the other side, but don't worry because later on you will be able to go back if you play through the game.
Submitted by Kevin I. 'Shinobi to Kage'