Pause the game and then enter the following
All Weapons
X,Triangle,L1,Up,Down,R2,Left,Left
Submitted by codeman10
Complete Map
Triangle,Triangle,L2,R2,L2,R2,R1,Square
Submitted by codeman10
Invincbilty
Down,L2,Square,R1,Right,L1,Left,Circle
Submitted by codeman10
WARP!
Right,Left,R2,R1,Triangle,L1,Circle,X
Submitted by codeman10
X-Ray
L1,R2,L2,R1,Right,Triangle,X,Right
Submitted by codeman10
Items On Map
Triangle,Triangle,L2,R2,L2,R2,R1,Circle