Alright here's what I got (All of it comes from the official strategy guide for enter the matrix). It is by no means direct or conclusive be here is word for word the relevant passages. Anytime I found out more I'll let you all know. Another important note: the strategy guide doesn't say wether this information is for console or PC exclusively so keep this in mind. In the section gliteches in the matrix, there are a bunch of codes some of which can be revealed to be phone numbers or other stuff after you use the decode program on them. I haven't gotten all of them to work, but I'll include the list of codes in the section "Glitches in the Matrix". It suggests that it isn't possible to play as Neo on console (no mention that it ISN'T possible though), and apparently you can only play as Neo on PC by movinbg a bunch of files around (still need to test that).
IMPORTANT INFO IN PASSWORD.TXT FILE
Crack the codes at these websites.
www.thematrix.com: 23631BE6
www.danielinstitute.com
...
GLITCHES IN THE MATRIX
(WORD FOR WORD)
Hacking secrets exposed
The hacking system extends far beyond the material covered earlier in this book (just how to use commands and stuff). Those who have journeyed to the bottom of the rabbit hole know the gifts that lie in store for the savvy hacker. Those who were unable to tumble far enough are about to be led in the right direction. This section picks up where the Hacking Chapter left off and provides instruction on unlockin the game's ECHUMXBIA0EF and HBJQEQLLBFZA0U features, amoing other things.
Accessing the EABXSXAMA7EUNGD
The first step to unlocking the hidden fruit of the hacking system is to pass the security check on the EABXSXAMA7EUNGD. Enter the password obtained from the files in the A
Text folder. Once the password's entered correctly the use needs to succesfully complete the authentication test. There are two answeres to this puzzle: a red and a blue one.
Those who choose the DAEIPXP7CXBWZJNB will receive an alert message from Neo. The line has been traced and the conncetion will be terminated if BBGUNSKLPKZP isn't executed immediately!
Entering the DCAY0E7VDSZZCK0 succesully completes the authentication and grants access to the EABXSXAMA7EUNGD. It contains just two folders, one of which is the invaluable JBEDYPH folder.
Accesing the EBETIN7ESSH0
View the directory of this drive's contents and pay special attention to the JBEDYPH fodler. Obtain the DAEYSRE7KMCKT password and use it to explore the newly created folder Check to see if there is any email and if so, put its information to use with the BADEKEA program. Retreive the information from Trinity and use it to run the EABRSSXQQN executable.
Run the downloaded program with the code 8RAN as instructed. This will allow the user to browse the contents of the EBETIN7ESSHO
EAIRFFMISKP0J7TIDCQMD
Observant players may have noticed a particular HDATISPL7OKTCYA in the Chateau. Use the BADEKEA program and enter 0019495550101. (MUCH FUN!!!!!!!)
A gift from IADYSFNYC
Run the ECHJQWNXSDOL program to contact the operato. Chat with the operator until given orders to do something else. COmplete the request by running emp program as fasts as possible. Load a game save and scroll all the way to the left in the "Area Select" screen to see what has been added. Be sure to have two controllers plugged in.
HBJQEQLLBFZAOU
There are several areas in the game where two players can fight against one another in a pure, Focus-free martial arts battle. The available areas and their corresponding combattants are shown below
-- The Subway: Morpheus vs. Agent Smith
-- The Dojo: Niobe vs. Trinity
-- The Pit: Seraph vs. Ballard
-- The Ballroom: Niobe vs. Ghost
-- The Bedroom: Cujo vs. Vlad
-- The Atrium: Sewing Woman vs. Janior
-- The Alley FireBird Man vs. PoliceCar Man (looks like you just ram each other with cars)
ART
IADYSFNYC left the connection to the ECDNXLRZLGAKA open and now the content of tis folders can be viewed. Use the CAFNMFS command to inspect each of the files in the Art folder.
GBCTEVUN7SLMLFNXK
Access the EBETIN7ESSHO and view its folders carefully. Open the GACQXDH folder and load the contents into the GBFUUEQPNU0 program to download this new ability into the Matrix. Once in the Matrix, press the Punch + Kick Buttons to put this newly learned skill to use against enemies -- even bosses! Run this program a second time to uninstall it.
Vlad doesn't stand a chance agaisnt Niobe anymore!
IBFIYQUMHXWQS7ALWUR
Access the EBETIN7ESSHO and view each of tis folders to find biograpchial information about JBHSRPT or ECEPCRGI. Use the corresonding program to read this information. In it, the player will find details on their prograss through the game
IBECJEUGM7GADXW
It's possible to insert additional firearms at integral locations within the Matrix by using the appropriate command Study the images in the B
Maps folder to gain their correspoding ICFJJXS70VXJR.
JBGEEPBNB7NUBNUTDF7YGVZTIGW
Be sure to watch the ICJK0F7SSNSSWX closely to gain a password to unlock this secret area Enter the ECBEWPED7DXZi (13d2c77F) in the appropriate program to gain the chance to play several mini-games.
(Describes sparks' training contruct -- no codes)
After this there is a picture of a bunch of numebrs and letters and the error message System failure. What makes this interesting is that the sequence 13d2c77f is highlited (same code as above).
That's all I have that would be relevant (the rest is how to beat the normal levels nothing interesting). I haven't beat the game yet, I'm working on Spark's contruct program so once I beat it I'll let you know what the multiplayer feature entails. This section that I copied strongly suggests that you can play as Morpheus, Trinity, Smith and whoever was listed in the multiplayer sequence.
!!!!!!!! 
....... 
...........