here are some hints and cheats i found........
Cheat mode:
Go to the Hacking engine in the game. Then, unlock the command allowing CHEATS. Submit one of the codes below to enable that particular cheat code.
How to find cheat codes:
Every highway sign you see in The Matrix: Reloaded is a cheat for the game, Enter The Matrix.
Look on the billboards in the game on the freeway.
Grappling:
If you want to grapple or throw push two buttons simultaneously.
Learning to FOCUS:
Once you have learned how to FOCUS you can pull off the infamous BULLET TIME. To pull off bullet time simply push L1. If your health or focus bars become depleted simply stay out of harms way.
Maximum firepower:
Submit the code 0034AFFF.
Unlimited ammunition:
Submit the code 1DDF2556.
Unlimited focus:
Submit the code 69E5D9E4.
Fast focus restore:
Submit the code FFF0020A.
Unlimited health:
Submit the code 7F4DF451.
Bonus test level:
Submit the code 13D2C77F.
Sparks' Construct in training mode:
Submit the code 13D2C77F or 1302C77F.
Enemies cannot hear you:
Submit the code 4516DF45.
Enemies cannot see you:
Submit the code FFFFFFF1.
Turbo mode:
Submit the code FF00001A.
Multi-player fighting:
Submit the code D5C55D1E.
Low gravity:
Submit the code BB013FFF.
Faster logos:
Submit the code 7867F443.
Taxi Driving:
Submit the code 312MF451.