Ninja Gaiden Sigma 2, stylized as Ninja Gaiden Σ2, is a port of the 2008
Xbox 360 video game Ninja Gaiden II, and was developed by Team Ninja
exclusively for the PlayStation 3 in 2009. It includes the entirety of
the original story mode as well as various changes to the game's design,
along with updated textures and a 720p resolution. The game changes
Ninja Gaiden II in a similar, but not identical way to how Ninja Gaiden
Sigma changed the original Ninja Gaiden. A port for the PlayStation
Vita, titled Ninja Gaiden Sigma 2 Plus (Ninja Gaiden Σ2+), was released
in 2013.[4]

Ninja Gaiden Sigma 2 was released for Microsoft Windows, Nintendo
Switch, PlayStation 4, and Xbox One as part of the Ninja Gaiden: Master
Collection on June 10th, 2021


the gameplay control system, the action button changed from RB/R1 to
circle, circle is now also the shuriken button. Other ranged weapons
were separated to the R2 button. This allowed both the Bow/Cannon to be
equipped at the same time as the shuriken. The player cannot unequip the
bow or cannon. Thus, the two weapons bulk up Ryu's appearance even
though they do not appear in cutscenes. Keys were completely removed.
Doors simply pop open now. Now (R1) tells the player where to go.
Projectile spam was greatly reduced from NGII. Healing items were
increased and are the only thing one can buy. Most chests now contain
yellow, blue, or red essence. Players no longer can hold onto Life of
the Gods, Lives of Thousand Gods, or Spirit of the Devil; instead, they
are automatically consumed upon pickup.

Changes were made to Ryu's weapons. Enma's Fang, a greatsword, was added
as a new melee weapon. The Incendiary Shuriken were removed for two
reasons, opening paths and their power due to the removal of the ammo
count, and is instead Ayane's main projectile weapon. The Fiend's Bane
Bow, now with unlimited ammo, had its Ultimate Technique removed. The
Howling Cannon, a heavy cannon with a slow projectile speed, served as a
replacement. Additional removed weapons include the Windmill Shuriken
and the Harpoon Gatling Gun. The Weapon Upgrade system was also altered
to restrict upgrades, allowing only one upgrade at a time per shop. In
addition, weapons can only be upgraded at shops where a blue flame is
lit; items can be bought in both types of the shop.

Enemies' health was raised to compensate fewer enemies appearing on
screen. Five new bosses were added, replacing two old boss encounters.
There is one new boss for each alternate character's chapter (including
returning bosses from Ninja Gaiden: Dragon Sword and the 2004 Ninja
Gaiden), a Dragon to replace the double Quetzalcoatl fight (though
Quetzalcoatl can still be fought alone as in Ninja Gaiden II), and two
giant statues: a giant Buddha Statue and a Statue of Liberty animated by
Alexei. The Tunnel Worm was omitted, causing Ryu to fall through a
tunnel leading from dark night to bright day. Most flying enemies were
removed due to infinite ammo.

Finally, almost all the gore has been removed in the PlayStation 3
version. Purple mist now bursts from enemies, along with reduced blood
splashes. Dismembered body parts no longer stay on the ground, but
vanish. Additionally, cinematics have been altered to remove
dismemberment, dissection and blood effects. In the Japanese version of
Sigma 2 the player can only decapitate monsters and non-humans; even the
pause menu and game over screens are colored blue instead of red to
reflect this change.

The Sigma 2 Plus version for the PlayStation Vita, however. restored all
the gore with the exception of the Japanese version. Its exclusive
features are Ninja Race and Tag Missions
Ninja Gaiden Sigma 2: Master Collection (PS5) 4K 60FPS HDR Gameplay -
(Full Game)