Unlock all levels:
Choose your profile to play offline. Choose solo or co-op, then at the main screen hold L1 + L2 + R1 + R2 then press Square, Square, Square, Square, Square, Circle, Circle, Circle, Circle, Circle.
Get the best selection of
Splinter Cell: Chaos Theory Cheats, Codes & Walkthrough/Guide/FAQ for PS2 from Cheat Code Central
The Genie has more
Splinter Cell: Chaos Theory Cheats at CheatingDome.com.