ENTER THE MATRIX UNLOCKABLES
Ending sequence
Finish the game under any difficulty. The ending sequence includes what appears to be a trailer for The Matrix Revolution, the sequel to The Matrix Reloaded.
Game trailer
Allow the game to idle at the main menu. It will eventually play the preview trailer that was used to promote the game through the website.
Alternate ending sequence
As Ghost, when you have to fight the man to see the oracle, you are supposed to lose. After you complete the game, go back and load that level. You can defeat him to get an alternate game ending.