Legacy of Kain: Soul Reaver

Aerial Reaver
Pause game play, then hold L1 or R1 and
press X, Right, Up(2), Triangle, Left(2),
Right, Up.
submitted by LSD

Aerial Reaver
Pause game play, then hold L1 or R1 and
press X, Right, Up(2), Triangle, Left(2),
Right, Up.
submitted by LSD

Constrict
Pause game play, then hold L1 or R1 and press Down, Up, Right(2),
Circle, Up(2), Down.
submitted by LSD

Debug mode
Pause the game and then hold L1 or R1. Now enter up, up, down, right,
right, left, circle, right, left, down. 
submitted by Kyle Jackson

Fire Glyph
Pause game play, then hold L1 or R1 and press Up(2), Right, Up,
Triangle, L2, Right.
submitted by LSD

Fire Reaver
Pause game play, then hold L1 or R1 and press Down, Up, Right, Up,
Down, Left, Circle, Right, Down. 
submitted by LSD

First-Person View
Press and Hold R2 + L2 while playing.
submitted by Nem

Force
Pause game play, then hold L1 or R1 and press Left, Right, Circle, Left,
Right, Left.
submitted by LSD

Force Glyph
Pause game play, then hold L1 or R1 and press Down, Left, Triangle,
Down, Up.
submitted by LSD

Hidden Menu in Beta Version
During gameplay, press Square + Circle and a hidden menu will appear
that enables invincibility, level select, etc. 

NOTE: The beta version is an unreleased demo. If you have a copy you
are most likely breaking the law. Be honest and buy the retail version.
submitted by Jared Pacheco

How to beat Kain
When you get to Kain, you'll be in a room that is circular and has different
levels. You need to stay at the bottom in the center. There is a thing that
restores all your health back to normal and keeps it there. When Kain
shoots you with his energy ball, stay on until you have full health again.
Then look around until you see a big blue energy ball, and run towards it.
Kain is making the energy ball. Quickly slice him with your Soul Reaver.
Keep this up until you have killed him. During the end of the battle, he will
go to the very top of the room where you can't see his energy ball. At this
point just run to where you think he is. It may take a few tries, but you can
beat him without injury.
submitted by Chris

Hurt Raziel
Pause game play, then hold L1 or R1 and press Left, Circle, Up(2),
Down.
submitted by LSD

Kain Reaver
Pause game play, then hold L1 or R1 and press X, Circle, Right, Triangle,
Left(2), Right, Up.
submitted by LSD

Make Fire Reaver
Pause game play, then hold L1 or R1 and press Triangle, Right, Down,
Circle, Up.

Maximum magic
Pause game play, then hold L1 or R1 and press Triangle, Right, Down,
Right, Up, Triangle, Left.
submitted by LSD

Pass through barriers
Pause game play, then hold L1 or R1 and press Down, Circle, Circle,
Left, Right, Triangle, Up.
submitted by LSD

Refill Health and Magic
To activate these codes pause the game then press and hold L1 and R1.
When the game is unpaused the cheats should be working.

Refil Health: Down, Circle, Up, Left, Up, Left

Refil Magic: Right, Right, Left, Triangle, Down, Right
submitted by Ed

Shift at any time
Pause game play, then hold L1 or R1 and press Up(2), Down, Right(2),
Left, Circle, Right, Left, Down.
submitted by LSD

Soul Reaver
Pause game play, then hold L1 or R1 and press Down, Triangle, L2,
Right(2), Down(2), Left, Triangle, Down, Right. 
submitted by LSD

Sound Glyph
Pause game play, then hold L1 or R1 and press Right(2), Down, Circle,
Up(2), Down.
submitted by LSD

Stone Glyph
Pause game play, then hold L1 or R1 and press Down, Circle, Up, Left,
Down, Right(2).
submitted by LSD

Sunlight Glyph
Pause game play, then hold L1 or R1 and press Left, Circle, Left, Right,
Right, Up(2), Left.
submitted by LSD

Upgrade health to next level
Pause game play, then hold L1 or R1 and press Right, X, Left, Triangle,
Up, Down
submitted by LSD

Wall climbing
Pause game play, then hold L1 or R1 and press Triangle, Down, L2,
Right, Up, Down.

Water Glyph
Pause game play, then hold L1 or R1 and press Down, Circle, Up, Down,
Right. 
submitted by Water Glyph