Bonuses
Collect the hidden briefcases and successfully complete the indicated level to unlock various bonuses. Note: Some briefcases are given as rewards for completing hidden objectives.
Machine Gun Kick combo: The Chase: I Need An Exit: The briefcase is in the corner of the market area behind the fruit stands.
Quick Kicks combo: Storming The Drain: Touch the top two platforms in the second to last room.
Storyboard Sequence 1: Red Pill: The Key: Successfully complete the bonus objective in the second room by not using any guns.
Storyboard Sequence 2: The Frenchman: Kill the first set of enemies, go to the red cross in the dungeon, go to the right to find the briefcase.
The Beginning Of The End combo: Seraph's Apology: Return to the teahouse from the theater then destroy one of the tables and all eight support columns.
The Codebreaker combo: Weapon Training: The briefcase is with The Operator's secret stash in the upstairs corridor when returning to teahouse.
The One combo: The Burly Brawl: Defeat 30 Agent Smiths and the briefcase will appear in the center of the level.
Ultimate Hyper Strike combo: Red Pill Rescue: The Security Guard: Defeat the SWAT team on the stairs within the time limit.
Completion bonuses
Successfully complete the game under the easy difficulty setting to unlock the "Unbreakable Melee Weapons" and "Bullet Reflection" options. Successfully complete the game under the normal difficulty setting to unlock the "Vampiric Health" and "All Weapons" options. Successfully complete the game under The One difficulty setting to unlock the "Infinite Health" option.
Defeating Agent Smith
To defeat Agent Smith at the train station, you must first weaken him. When you hear an announcement of a train approaching, grab a hold of him and throw him in front of the train.
Defeating the Witch
Use the Bullet Stop ability to throw the various items in the room at her. They each do a lot of damage. When she casts the Barrier spell, avoid her or your weapon will break and you will be stunned. Make sure to disarm her as soon as possible.
Dojo: Dive through walls
In the Dojo when finding the Killing Blow, you can get through doors easier without slashing them by diving through them with Square. You can also tell the difference between fake and real doors by doing this.
See through leaves
In the intermission sequence in the garden, Trinity says "Keep your blade sharp". They turn to face the camera, and you can see Neo's hair through the leaves when they cover his head.