Ninja Gaiden 2 Cheats - Xbox 360

Achievements
Complete each achievement to get the allotted gamerscore:

Completed Chapter 5 (10) - Clear Chapter 5, The Aqua Capita.
Completed Chapter 7 (10) - Clear Chapter 7, The Flying Fortress Daedalus.
Completed Chapter 9 (10) - Clear Chapter 9, Heart of Darkness.
Diffused The Lightening (15) - Defeat Alexei for the second time.
Dragon Sword Master (5) - Complete the game using only the Dragon Sword.
Dual Katana Master (5) - Complete the game using only the Dragons Claw and Tigers Fang.
Mastered Counter Attack (5) - Successfully performed the Counter Attack Technique.
Mastered Obliteration Technique (5) - Successfully performed the Obliteration Technique.
Mastered Reverse Wind (5) - Successfully performed the Revers Wind Technique.
Mastered Shadowless Footsteps (5) - Successfully performed the Shadowless Footsteps Technique.
Mastered Ultimate Guidance (5) - Successfully performed the Ultimate Guidance Technique.
Mastered Ultimate Technique (5) - Successfully performed the Ultimate Technique.
Mastered Flying Bird Flip (5) - Successfully performed the Flying Bird Flip Technique.
Mastered Flying Swallow (5) - Successfully performed the Flying Swallow Technique.
Mastered Furious Wind (5) - Successfully performed the Furious Wind Technique.
Mastered Invisible Path (5) - Successfully performed the Invisible Path Technique.
Mastered Unrivaled Soaring (5) - Successfully performed the Ultimate Soaring Technique.
Eclipse Scythe Master (5) - Complete the game using only the Eclipse Scythe.
Eight Of White (15) - Beat the eight Test of Valor.
Ended The Infernal Reign (15) - Defeat High Infernal Priest, Dagra Dai.
Extinguished The Flame (15) - Defeat Zedonius for the second time.
Falcon's Talons Master (5) - Complete the game using only the Falcon's Talons.
Feat of a hundred Slashes (20) - Achieve a 100-hit combo with any weapon.
Feat of a Thousand Obliterations (20) - Defeat 1,000 enemies using Obliteration Techniques.
Feat of Ultimate Destruction (20) - Defeat 1,000 enemies using Ultimate Techniques.
Finished Chapter 1 (10) - Finished Chapter 1: "Sky City Tokyo".
Finished Chapter 2 (10) - Finished Chapter 2: "The Castle of the Dragon".
Finished Chapter 3 (10) - Finished Chapter 3: "Thunderclap of Catastrophe".
Five Of Yellow (15) - Beat the fifth Test of Valor.
Four Of Green (15) - Beat the fourth Test of Valor.
Indomitable Spirit (5) - Choose to continue the game 100 times.
Karma of the Master Ninja (20) - Obtain all of the Crystal Skulls.
Karma of the Mentor (20) - Obtain 20 Crystal Skulls.
Karma of the Warrior (20) - Obtain 10 Crystal Skully.
Kusari-gama Master (5) - Complete the game using only the Kusari-gama.
Lunar Staff Master (5) - Complete the game using only the Lunar Staff.
Nine Of Violet (15) - Beat the last Test of Valor.
One of White (15) - Purified the site of the the first Test of Valor.
Redeemed Genshin (15) - Defeat Genshin for the last time.
Seven Of Red (15) - Beat the seventh Test of Valor.
Silenced The Storm (15) - Defeat Volf for the second time.
Six Of White (15) - Beat the sixth Test of Valor.
Staunched The Blood (15) - Defeat Elizébet for the second time.
The Art Of Inferno (5) - Successfully performed the Art of the Inferno Ninpo.
The Art of the Flame Phoenix (5) - Successfully performed the Art of the Flame Phoenix Ninpo.
The Art of the Piercing Void (5) - Successfully performed the Art of the Piercing Void Ninpo.
The Art of the Wind Blades (5) - Successfully performed the Art of the Wind Blades Ninpo.
Three Of Blue (15) - Beat the third Test of Valor.
Tonfa Master (5) - Complete the game using only the Tonfa.
Two of Black (15) - Purified the sit of the the second Test of Valor.
Vanquished Volf (15) - Defeat Volf in battle.
Vanquished Alexei (15) - Defeat Alexei in battle.
Vanquished Elizébet (15) - Defeat Elizébet in battle.
Vanquished Genshin (15) - Defeat Genshin in battle.
Vanquished Zedonius (15) - Defeat Zedonius in battle.
Vigoorian Flail Master (5) - Complete the game using only the Vigoorian Flail.
Way of the Mentor (100) - Complete the game on the Path of the Mentor.
Way of the Acolyte (100) - Complete the game on the Path of the Acolyte.
Way of the Master Ninja (100) - Complete the game on the Path of the Master Ninja.
Way of the Warrior (100) - Complete the game on the Path of the Warrior.

Mission Mode Achievements
Complete Mission mode with the following requirements to unlock the new Downloadable Content Achievements:

Eight Missions Completed (30) - Complete 8 Missions.
First Medallion (20) - Obtain a Medallion in a Survival Mission.
Four Missions Completed (30) - Complete 4 Missions.
Master Ninja of Missions (20) - Complete all Karma Attack Missions on Path of the Master Ninja.
Mentor of Missions (20) - Complete all Karma Attack Missions on Path of the Mentor.
Acolyte of Missions (20) - Complete all Karma Attack Missions on Path of the Acolyte.
All Bronze (30) - Obtain all Bronze Medallions in the Survival Missions.
All Gold (30) - Obtain all Gold Medallions in the Survival Missions.
All Silver (30) - Obtain all Silver Medallions in the Survival Missions.
Warrior of Missions (20) - Complete all Karma Attack Missions on Path of the Warrior.

New Game +
Save after completing the game to unlock New Game +. When playing a New Game + you will begin play on the same difficulty you completed with all weapons from the previous game at their current level. You will also keep your life, ninpo, items and essence.

Hidden Silver Xbox
In the bottom of the Statue of Liberty across from the Test of Valor. You have to slice what it looks like to be bamboo curtain.

What it does in NGII is heal you, which you can do as many times as you like. It'll also make a sound from part of the 360's start up intro.

Easter Egg: Prototype Xbox
About midway through Chapter 4, in the artifact room at the base of the Statue of Liberty, locate the nearby save point. Diagonally across from where the Save Point is, and directly to the right of the scroll on the podium, there is a false wall you can break apart. Inside, there will be a silver Xbox that regenerates Ryu's health.