I mean the big different in Sigma vs Black is that Sigma was removing most if not all of the puzzles. So I guess if you wanted your action adventure to just be action then Sigma might be an upgrade?
Breakdown below:
--ZARKHAN STADIUM PUZZLE
XBOX VERSION: To leave the stadium, Ryu had to pull various levers
around the arena. Each lever re-positioned the floating platforms to a
specific position which allowed Ryu to traverse to the upper balcony.
PS3 VERSION: Technically, the floating platform puzzle is still intact,
but Ryu only needs to pull ONE lever to solve the puzzle.
--PYRAMID PUZZLE
XBOX VERSION: The Pyramid puzzle takes place immediately after the Alma
Awakened battle. Ryu had to place two sets of Tablets into certain
slots in one room and then fight off a bunch of Dung Beetles. Once the
puzzle was solved, the chapter ends.
PS3 VERSION: This puzzle has been completely omitted for a different
puzzle inside the Pyramid. The puzzle takes place on the following
chapter AFTER The Fiendish Awakening. Instead of inserting Tablets into
walls and fighting Dung Beetles, Ryu only needs to defeat three
Knightmares to solve the puzzle.
--CHAPTER 1 GAMEPLAY CHANGE
XBOX VERSION: The Flying Swallow was a technique that can only be
obtained by upgrading the Dragon Sword to Level 2.
PS3 VERSION: The Flying Swallow is now learned by a Technique Scroll
found in the Ninja Fortress instead of upgrading to Level 2.
--CHAPTER 2 GAMEPLAY OMISSION
XBOX VERSION: Originally, at the beginning of Chapter 2, Murai would be
standing in the middle of the room. If you approached him, he would
give Ryu a crucial lesson on how to utilize the Reverse Wind and the
Ultimate Technique. When the lesson was over, Murai would tell you "Now
go to your people!"
PS3 VERSION: In all subsequent releases (including Sigma), Murai no
longer gives you this lesson. At the beginning of Chapter 2, Murai
would just tell you "Now go to your people!" if you approached him.
--CHAPTER 2 GAMEPLAY DELETION
XBOX VERSION: Whenever Ryu accessed Muramasa's Statue from Chapter 2
and on, there was a third option in the Muramasa menu called "TALK".
When Ryu accesses it, Muramasa will give a few silly and useful quotes.
PS3 VERSION: The "TALK" option has been completely removed from the
Muramasa menu.
--CHAPTER 4 ITEM RELOCATION
XBOX VERSION: The Stone Tablet (Top) was originally found in Twin
Serpents Plaza behind the metal gate. It was obtainable as early as
Chapter 4 and as late as Chapter 13.
PS3 VERSION: The item is no longer found there (the Lunar takes its
place) and has been relocated to a chest in Chapter 10 near the
stairway going to the Military Gate. The Lunar is now found behind the
metal gate.
--CHAPTER 4 DELETIONS
XBOX VERSION: When Ryu enters Clock Tower Square, there was an
additional Red-jeweled door (that lead to Moat Road) and an alleyway
with a dead body adjacent to the Pleasure Street door. Also, when Ryu
reaches Han's Bar, he encountered a bald-headed, eyeglass wearing
bouncer at the front door that asked for a "ticket to the party".
PS3 VERSION: All these elements (except the dead body) have been
completely deleted from the PS3 version.
--CHAPTER 4 GAMEPLAY OMISSION
XBOX VERSION: As soon as Ryu reaches Han's Bar, the bouncer originally
told him he needed a "Ticket" to get in. Ryu then had to go back to
Muramasa's Shop and buy an item to obtain the Ticket. When Ryu returns
to the bar, that's when the bar patrons start running outside. On the
next chapter, Ryu finds the LILLY KEY on the roof of the Bar.
PS3 VERSION: As soon as Ryu reaches Han's Bar, a Motorcycle MSAT
soldier appears and asks "Do you have a Ticket for the Party?" (the
line originally asked by the bouncer). Ryu then fights off a couple of
Motorcycle MSAT soldiers and wins the LILLY KEY as a prize. After the
fight, the bar patrons start running outside.
--CHAPTER 6 DELETIONS
XBOX VERSION: When Ryu finds the NES versions of Ninja Gaiden 1-3 or
the Arcade NG (from Ninja Gaiden BLACK), he can go to Han's Bar and use
the arcade machine located on the first floor to play the games.
PS3 VERSION: The arcade machine no longer exists in this version. Since
there is no NES or Arcade unlockables, the arcade machine was removed.
--CHAPTER 9 PUZZLE OMISSIONS
XBOX VERSION: In the Red Eye Chamber, there was a walkway in the middle
of the room with swinging pendulums and spikes. After killing the
Zombies, Ryu had to cross the walkway while dodging the pendulums and
jumping past the spikes.
PS3 VERSION: The pendulums and spikes have been omitted and the room is
now flooded, making it less tedious to solve the Red Eye puzzle.
--CHAPTER 10 GAMEPLAY ADDITION
PS3 VERSION: When Ryu descends the stairs to Drawbridge Square, the
Tomahawk Chopper will ambush him from above by dropping bombs. The
Chopper also makes a surprise flyby at Moat Road.
--CHAPTER 10 GAMEPLAY CHANGE
XBOX VERSION: When Ryu reaches Drawbridge Square, he can either exit
the area by going past Moat Road OR he could enter through the Blue-
jeweled doorway. If Ryu entered the Blue-jeweled door, he can crack the
wall at the end of the alley and emerge towards Dworku Alleyway.
PS3 VERSION: The Blue-jeweled doorway is blocked off by an Armored car
and Ryu has no choice but to go through Moat Road.
--CHAPTER 10 GAMEPLAY CHANGES
XBOX VERSION: After Ryu eliminates the soldiers at the Military Gate,
the Tomahawk Chopper will fly by the area and shoot bullets and drop a
few bombs at Ryu. After a minute, the chopper flies off. Next, Ryu had
to shoot an RPG soldier hiding in the adjacent building. Once the RPG
soldier perishes, a short cutaway reveals the STRONGBOW in the same
room the RPG soldier was in. Ryu then had to go and retrieve the
STRONGBOW at the Skull Gate area and then shoot the medallion above the
Military Gate to open it and end the chapter.
PS3 VERSION: Once Ryu clears the Military Gate, an RPG soldier will
emerge in a room on the adjacent building. Once Ryu, eliminates him,
he'll receive the STRONGBOW as a prize. Once he obtains the item, Ryu
faces off against Alternator. Once Alternator is eliminated, the
Military Gates open and the chapter ends.
--CHAPTER 11 PUZZLE OMISSIONS
XBOX VERSION: When Ryu is in the Warehouse, he needed to turn on the
lights to activate the power in the warehouse. After activating the
power, he needed to activate the hanging platforms by pressing the red
button switch located between the trains.
PS3 VERSION: Ryu only needs to activate the lights to activate
everything in the warehouse. It's less back-and-forth footwork for Ryu.
--CHAPTER 13 PUZZLE DELETIONS #1
XBOX VERSION: When Ryu would traverse underwater, his vision would get
darker and the only way to make it brighter was to find the OWL'S EYE
item. Also, in order to get to the area with the second Save Point, Ryu
needed to solve a numeric combination on an underwater doorway.
PS3 VERSION: The OWL'S EYE is no longer needed for Ryu to swim in
darker areas and the numeric combination puzzle is gone.
--CHAPTER 13 PUZZLE DELETIONS #2
XBOX VERSION: When Ryu is in the second Save Point area of the Moats,
there was a large alcove near the Save Point that had a large altar.
Ryu needed to find two Medallions and place them on the altar to open a
new doorway to the other side of the Moats
PS3 VERSION: The Medallion Puzzle no longer exists. Instead, Ryu only
needs to find the Triton Key to get to the other side of the Moats.
--CHAPTER 15 DELETIONS
XBOX VERSION: After leaving Zarkhan Stadium, Ryu receives a Kunai
Scroll from Ayane about Muramasa wanting to see him about something.
When Ryu visits Muramasa at his shop, he tells Ryu about a "Dragon's
Eye" that can be placed under the Dragon Sword.
PS3 VERSION: Ryu never receives the Kunai from Ayane and the doorway
leading back to Great Bridge Square is locked down.
--CHAPTER 15 GAMEPLAY CHANGES
XBOX VERSION: As soon as Ryu entered the Magma Caverns, he had to find
FOUR pieces of Iron Ore. There were six total pieces of Iron Ore in the
Magma Caverns and when four pieces are collected, Ryu could place them
into the boiling pot in the See-Saw Room to make the COG OF VIGOOR.
PS3 VERSION: There are no pieces of Iron Ore to find. Ryu can just
simply approach the boiling pot in the See-Saw Room to automatically
create the COG OF VIGOOR item.
--CHAPTER 15 DELETIONS
XBOX VERSION: After Ryu defeats Yotunfrau, he has to go back to the
Magma Caverns and place the COG OF VIGOOR at the door near Muramasa's
Statue. When he places the Cog, Ryu enters another cavern with a Save
Point. The cavern had fire-breathing statues that Ryu needed to dodge
in order to get to the Flame Worm boss. Once Ryu defeats the Flame
Worm, Ryu has to enter the back of the cavern and then run and jump to
the other side by slamming down on a step-button in order to exit.
PS3 VERSION: Once Ryu places the COG OF VIGOOR into the doorway, the
next area will already be the Flame Worm boss battle. After the battle,
Ryu can just exit by using the same doorway. See how simple it is?
--CHAPTER 15 LOCATION CHANGES
XBOX VERSION: When you encountered the Flame Worm, its lair was a
concrete wall with him in the center. Ryu also had an entire platform
to battle it on.
PS3 VERSION: The Flame Worm's lair is now filled with multiple worm
holes. The Flame Worm can emerge and attack from any direction while
Ryu battles it from a tiny little platform.
--CHAPTER 16 LOCATION CHANGES/ADDITIONS
XBOX VERSION: When Ryu teleports back to Hayabusa Village, he ends up
near the village entrance area. He then has to traverse through to the
Graveyard to find the other portal.
PS3 VERSION: After teleporting from Twin Serpents Plaza, Ryu ends up in
Hayabusa Village near the Graveyard. When he traverses to the portal
near the village entrance, he has to fight some Samurais and Warlocks.
--CHAPTER 17 ITEMS RELOCATION
XBOX VERSION: In order to obtain the RAPTOR DIETY Statue, Ryu had to
find it in the Monk's Room inside the Monastery.
PS3 VERSION: After defeating Spectral Doku, the Labyrinth exit to the
Imperial Palace area opens up and the RAPTOR DIETY Statue is found
above the door exit.