Cheat List:
Go into the Hacking system, and enter cheat.exe at the A> prompt to unlock the cheat menu. Enter these numeric codes to unlock the corresponding function:
All weapons 0034AFFF (thanks to mike)
Bonus level 13D2C77F
Invisibility FFFFFFF1
Faster Logos 7867F443
Infinite ammo 1DDF2556
Infiite focus 69E5D9E4
Infinite Health 7F4DF451
Recover Focus Fast FFF0020A
Enemies can't hear 4516DF45
Enemies can't see FFFFFFF1
Turbo mode FF00001A
Faster Logos 7867F443
Multiplayer D5C55D1E Console Only)
Low gravity BB013FFF Console Only)
Taxi Driving 312MF451 Console Only)
Want to know more about these codes? Then please read the FAQs.

Cheat Warning:
If you are having problems with your game freezing up on you, make sure you are not playing with any cheats enabled. The game has been known to lock up (Airport Level is a good example), when certain cheats (All Guns cheat especially) are employed.

Dispense Powerade:
Go to any of the Powerade machines you see in the game and press the Action button to dispense a beverage.

Hear Message From Morpheus:
Go to the Hacking menu and tyep LOGIN. When that selection appears on the Command List, move over to LOGIN and click it. Login as COWBOYCURTIS or FREEMIND to unlock Morpheus samples. Press the numbers indicated to hear the samples.

Hint: Hacking Shortcut:
Instead of typing in Yes or No you can simply type the letters Y or N. It saves time if you have several lines of code to enter.

See Revolutions Trailer:
Beat the game to see a sneak peek of The Matrrix: Revolutions.

Hint: Agent Busting:
This works on levels where bottomless pits are available (like falling off a skyscraper).

The trick is knock Agents off buildings, if they manage to grab the edge simply shoot them a few times and Agents will attempt to dodge. Instead, they tend to let go of the ledge and fall off.