NINJA GAIDEN II

All credit for this achievement guide goes to Andrew x360a and Fizzmatix of Xbox360Achievements.org.

To unlock the Tests of Valor you must have the Rod of Trials. When you're first working your way through the Hyabusa Village in Chapter Two, you'll come to a large open courtyard and face off against a horde of ninjas that feels almost endless. Keep persevering and once you finish them all off, the candles near the altar on the side will light up. Approach the altar and you'll have the option to pick up the Rod and the Tests of Valor will now appear throughout the game.

You find the six Test of Valor in Chapter Eight, "Submit or Die!". After the part where you're working your way through the underground tunnels and the water, you will come to a ladder. Do the Flying Bird Flip to make it out. Blow a hole in the wall with the incendiary shurikens and then you will be in a huge lobby. There will be a save point down the stairs and a shop on the other balcony from where you entered. Use this to stock up on whatever you need. Then when you are ready, head downstairs, follow the red carpet and go through the huge brown door to the Gate of the 6th Test of Valor. There is a box of arrows to the right of the gate.

Enemies:
Small Mechs
RPG Ninjas

Strategy: During this challenge you are under constant fire from both automatic machine guns and burst fire rockets. The best chance of staying alive is to constantly be moving (especially in air) and blocking whenever you are under fire. Focus on the rocket ninjas first because their rockets can break your block and can hit you very easily when you're in the air. Move around the outer part of the arena and do the Flying Swallow Technique to quickly dispose of the rocket ninjas. You can also try blindly throwing your Incendiary Shurikens to take off an arm. When they stop spawning focus your attention on the mechs. The only threat that they can be to you is if you get to close to them - they will shoot and charge into you. Again just use the Flying Swallow Technique to stay off the ground. When they die, they blow up so make sure to avoid or block the blast.

Reward:
Jewel of the Demon Seal

http://www.xbox360achievements.org/game/ninja-gaiden-2/guide...#

You should focus on the rocket ninjas first since they will do the most damage to you.

I ran around in a circle around the outer edge of the area throwing explosive shuriken at the rocket ninjas until I was out.

(You want to keep moving at all times to avoid damage.)
After that I used flying swallow on the remaining rocket ninjas until they were all dead.

Once all rocket ninjas were dead I just spammed flying swallow at the mechs until they were cleared.