Cheat mode:
During gameplay hold L1 + R2 + Left + Triangle, then press Start. A cheat menu with invincibility 
and level warp options will now be unlocked. 

All feats: 
While playing a game, hold L1 + R2 + Triangle + Left, then press Start. Your character will now be 
at level 20 and have access to all feats.Your character will also have level 1 feats on all class-
dependent feats and 75,000 more gold pieces.  Your character will not advance to a higher level or 
gain additional feats.
Submitted by Ghetto202k

Play as Drizzt: 
At the main menu hold L1 + R1 then press X + Triangle. Alternative complete the game on the extreme 
difficulty setting. 
Submitted by Ghetto202k