At the character selection screen, press Square, L2, R2, Circle,
Square, L1, L1, L2.
All seasons (sim mode):
At any menu screen, press L2, R2, Square, Circle, R1, R1, L1,
Unlock Kevin Nash:
At any menu screen, press L2, Square, R2, Circle.
Level skip (season mode):
While playing, pause then hold L3 and press Square, Circle, R1,
L1, L2, Square, Square, Square.
While playing, pause then hold L3 and press Triangle, Square,
Square, Square, Square.
While playing, pause then hold L3 and press X, L1, R1, R2, Triangle.
Beat Season Mode with one of the following characters to unlock
Hulk Hogan The Rock
Ric Flair Kurt Angle
Bradshaw Brock Lesnar
D-Von Dudley Bubba Ray Dudley
Lita Matt Hardy
Ric Flair The Big Show, Rob Van Dam and Triple H
Christian Chris Jericho
Stephanie Mcmahon Kurt Angle