View boundaries:
 
Pause game and press Select (x2), Circle (x2), 
Triangle (x2), Square (x2). (Correct entry
resumes game.) Flashing lights indicate the 
playing field boundaries. 

View debug information:
 
Pause game and press Select (x2), Circle (x2),
L2, R2, L2. (Correct entry resumes game.) To
disable cheat, press Select (x2), Circle (x2),
R2, L2, R2. 

Run faster: 
Pause game and press Select (x2), Circle (x2),
Square (x2), Circle (x2). (Correct entry
will resume game.) Repeat to disable cheat. 

Exit door at any time: 
Pause game and press Select (x2), Circle (x2),
Square, Triangle, Square to exit a door even
if the primary objective has not been completed. 

Freeze objects: 
Pause game and press Select (x2), Circle (x2),
Select (x2), Triangle (x2). (Correct entry 
will resume game.) All objects will freeze, 
allowing you to literally run to the exit.

God Mode: 
Pause the game. Then press Select, Select, 
Circle, Circle, Triangle, Select. 

Invincibility: 
Pause game and press Select (x2), 
Circle (x2), Triangle, Select. (Correct 
entry will resume game.) 

by AcID