X Nintendo DSUnlock all levels: Hold L1 L2 R1 R2 then press Square, Square, Square, Square, Square, Circle, Circle, Circle, Circle, Circle. More Splinter Cell: Chaos Theory Cheats Splinter Cell: Chaos Theory Splinter Cell: Chaos Theory - Completion bonuses Splinter Cell: Chaos Theory - Unlock All Levels April 9, 2005 - 6:33am