End Level, Level Skip and Level Select
To end your current level, pause the game, highlight "Map," and press "Right," "L2," "R2," "Circle," "Square" and "X" simultaneously. Enter the "Cheats" menu from the options screen, then choose "End Level." To skip your current level, pause and highlight "Map," then press "Right," "L2," "R2," "Circle" and "Square" sequentially. To unlock Level Select, complete the game on normal difficulty.
Expert Mode
Add extra challenge to your game with the Expert game mode. To activate Expert Mode, highlight "New Game" from the main menu and press "Square," "Circle," "L1," "R2," "Up," "X" and "Select" simultaneously.
Super Agent Mode
Pause the game while playing, then highlight "Weaponry" and press "Select," "Square," "Circle," "X" and "L2" simultaneously. Select "Cheats" from the options screen and toggle "Super Agent Mode." You will now be able to kill enemies with flak body armor with a single shot.
Movie Theater
To unlock many of "Syphon Filter 2's" video sequences, pause the game and highlight "Briefing," then press "Right," "L1," "R2," "Circle" and "X" simultaneously. Enter "Cheats" from the options menu to access the theater. To unlock the remaining four Bonus Movies, complete the game on Hard Mode. You will unlock Movie 1 after reaching Level 6: United Pacific Train, Movie 2 after reaching Level 12: Industrial District, Movie 3 after reaching Level 17: Agency Bio-Lab and Movie 4 after completing the entire game.
Multiplayer Character Unlockables
Complete Level 2: McKenzie Airbase Interior in less than three minutes to unlock the "goofies" multiplayer characters, such as the bag lady, the monk and the corpse. Complete Level 8: C-130 Wreck Site in less than three minutes to unlock the multiplayer characters from the original "Syphon Filter." To unlock "Syphon Filter 2's" multiplayer characters, on Level 20: Slums District, on your way up the stairs in the parking garage, do not stop at the open door. Instead, proceed up the stairs to find an M-79 and unlock the characters.