• Follow Ryu Hayabusa into the world of PS3's Ninja Gaiden Sigma, an update of the classic Nintendo trilogy. Beating Sigma depends largely on the tools you have--namely a strong arsenal and an abundant supply of health. With yellow essence, you can attain enough to conquer Ryu's enemies and save the world as he knows it. Here are three great Ninja Gaiden Sigma Cheats to ensure Ryu is prepared when the going gets tough.
  
  

Chapter 4: Unlimited Yellow Essence at the Town Gate

• While in the Imperial City, stop at the shop on the edge of town. It will be located next to the town gate. Here you encounter an enemy who can provide you with a wealth of valuable yellow essence. Simply attack him with nine shurikens, or throwing stars, gaining 100 points for each hit. Do not throw a tenth, as this will kill the enemy and limit the amount of yellow essence you receive. Instead, exit the gate and return, resetting the number of shurikens with which you can attack. Repeat until you are comfortable, as yellow essence allows you to purchase more powerful weapons, attacks and health potions.
  
  

Muramasa Shop: Yellow Essence Dirty Cheat

• Muramasa's shop is a frequent hangout for Ryu. It's a place where he can restore health, energize attacks and acquire weaponry. With the unquestionable difficulty of Ninja Gaiden Sigma, you have to do whatever it takes to keep Ryu prepared. Sometimes this means resorting to questionable tactics. When you encounter a shop, and there are many throughout the game, mobilize a weapon such as your nunchuck and attack Muramasa the shopkeeper with it to rob him of yellow essence. Be careful. This is not an unlimited attack, unlike what you will encounter in scenes such as the one in Chapter 4. If you kill Muramasa, your game ends, so don't be too greedy.
  
  

Chapter 5: Purple Creatures and Yellow Essence

• At the aqueduct level you will cross a drawbridge and encounter a trio of sword-wielding purple creatures. Brandishing a wooden sword called the Unlabored Flawlessness, keep a safe distance and hold your triangle button to power up the weapon. Unleash. This attack delivers a trio of blows, and gives Ryu a special box.
  
  Next, escape back to the save point by jumping off the ledge or taking the stairs. Save the game, and walk back up the staircase. Slay all three creatures, and receive yellow essence. Repeat as often as you like, and be ready for your next visit to Muramasa's shop.
  
  Gaming experts at IGN Entertainment attest the Ninja Gaiden series is one of the most challenging on any console gaming platform. Sigma is no exception. But if you stock up on yellow essence and use it to make the necessary weapons and health upgrades, you will survive and conquer.