Difficulty Level

The Difficulty Level of a game in the Ninja Gaiden series determines enemy strength and limitations the player will be presented with during gameplay. In most Ninja Gaiden games, players choose a difficulty level when starting a new game, and they cannot change the level once they have started. Traditionally, a grueling but feasible difficulty is accessible from the start, alongside an easier difficulty that is sometimes unlocked by repeatedly failing on the normal level. Successive levels of difficulty are then unlocked each time the previous level is completed, all the way up to the hardest level called "Master Ninja", or in later titles "Ultimate Ninja".

Overview

All games start the player on a "normal" difficulty, but, after fulfilling certain criteria, the player can opt to play through the story missions again on a higher difficulty. Typically, difficulties above the default will also alter enemy waves, having powerful enemies appear much sooner than they normally would and in greater numbers, especially in Tests of Valor. Bosses have more health and deal more damage, in addition to feature support from normal enemies during their battle. Item locations are usually rearranged and their maximum capacity is decreased. Prices at Muramasa's Shop also scale with the difficulty level.

While some games like Ninja Gaiden (Xbox), Ninja Gaiden II, and Ninja Gaiden 3: Razor's Edge allows the player to keep items and abilities gained from a previous playthrough when moving to a successive play on the same difficulty level, different difficulties always require starting out with a "fresh character" first.

List of difficulties in each game

Game	Available Difficulty Levels
Ninja Gaiden			Normal	Hard	Very Hard
Ninja Gaiden Black		Ninja Dog	Normal	Hard	Very Hard	Master Ninja
Ninja Gaiden Sigma	Hero Mode	Ninja Dog	Normal	Hard	Very Hard	Master Ninja
Ninja Gaiden Sigma Plus	Hero Mode	Ninja Dog	Normal	Hard	Very Hard	Master Ninja
Ninja Gaiden: Dragon Sword			Normal	Head Ninja		Master Ninja Master Kunoichi
Ninja Gaiden II			Path of the Acolyte	Path of the Warrior	Path of the Mentor	Path of the Master Ninja
Ninja Gaiden Sigma 2	Hero Play Style		Path of the Acolyte	Path of the Warrior	Path of the Mentor	Path of the Master Ninja
Ninja Gaiden Sigma 2 Plus	Hero Play Style		Path of the Acolyte	Path of the Warrior	Path of the Mentor	Path of the Master Ninja
Ninja Gaiden II: Black	Hero Play Style		Path of the Acolyte	Path of the Warrior	Path of the Mentor	Path of the Master Ninja
Yaiba: Ninja Gaiden Z			Normal			Hell
Ninja Gaiden 3	Hero		Normal	Hard	Master Ninja	Ultimate Ninja
Ninja Gaiden 3: Razor's Edge	Hero		Normal	Hard	Master Ninja	Ultimate Ninja
Ninja Gaiden: Ragebound			Normal	Hard
Ninja Gaiden 4	Hero		Normal	Hard		Master Ninja

Difficulties by game

Ninja Gaiden

• Normal: default difficulty, initially selectable alongside Hard. Completing the game at this level unlocks the "Cyber Ninja" costume and the Very Hard difficulty.

• Hard: initially selectable alongside Normal. Enemies have more health and deal more damage. In addition, enemy waves feature greater numbers of opponents. Completing the game at this level unlocks the "Cyber Ninja" costume and the Very Hard difficulty.

• Very Hard: enemies have even more health and deal more damage. In addition, enemy waves feature greater numbers of opponents. Completing the game at this level unlocks the "Fiend Curse" costume.

Ninja Gaiden Black

• Ninja Dog: secret easy difficulty unlocked by dying three times consecutively during Chapter 1 on Normal. The player will start inside the ninja fortress already and Ayane's kunai scrolls will also grant the players items and new accessories. The first time the player dies in a chapter, they'll receive an extra item upon continuing. Completing the game at this level unlocks the "Doppelganger Fiend" costume, the Hard difficulty, Mission Mode, Movie Theater, and Sound Test. Loading a Ninja Dog difficulty save file and resetting will change the start screen theme to Ayane. The rest is identical to Normal.

• Normal: default difficulty, and the only one initially selectable. Dying three times consecutively during Chapter 1 unlocks the Ninja Dog difficulty. Completing the game at this level unlocks the "Doppelganger Fiend" costume, the Hard difficulty, Mission Mode, Movie Theater, and Sound Test.

• Hard: enemy waves are changed, with powerful enemies appearing much earlier in the game and in greater numbers. Boss battles start to feature a couple of additional opponents that respawn when the boss' health decreases to set thresholds. In addition, bosses have more health and deal more damage. New sub-bosses called "Doppelganger Fiends appear in certain locations. Prices at Muramasa's Shop increases and Golden Scarab rewards are changed. Item locations are rearranged, with a decrease in high-tier Health Items and all types of Ninpo Items. Item maximum capacity is also decreased. Completing the game at this level unlocks the "Red Muffler" costume and the Very Hard difficulty.

• Very Hard: enemy waves are changed again, with even powerful enemies appearing much earlier in the game and in greater numbers. In addition, supporting foes during boss battles are also changed to stronger variants. Bosses have more health and deal more damage. A new Doppelganger Fiend sub-boss appears in a certain location. In addition, Nicchae and Ishtaros replace Hydracubus and Yotunfrau in Chapter 15. Prices at Muramasa's Shop increases and Golden Scarab rewards are changed. Item locations are rearranged, with a decrease in high-tier Health Items and all types of Ninpo Items. Item maximum capacity is also decreased. Completing the game at this level unlocks the "Legendary Dragon Ninja" costume and the Master Ninja difficulty.

• Master Ninja: enemy waves are changed again, with the most powerful enemies appearing much earlier in the game and in greater numbers. In addition, supporting foes during boss battles are also changed to the strongest variants. Bosses have more health and deal more damage. A new Doppelganger Fiend sub-boss appears in a certain location. Prices at Muramasa's Shop increases and Golden Scarab rewards are changed. Item locations are rearranged, with a decrease in high-tier Health Items, and a complete removal of Elixir of the Devil Way and Great Devil Elixir outside the shop. Item maximum capacity is also decreased.