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Secret Combat Moves
There are several combat moves that they don't tell you about in the manual or in
the strategy guide. I have found a few:

Custom combos You can use combos of punches AND kicks instead of punches OR
kicks. You can even add a throw to the end of some. Try these:
CIRCLE, CIRCLE, TRIANGLE, TRIANGLE
CIRCLE, TRIANGLE, TRIANGLE, DOWN + CIRCLE + TRIANGLE
Gun throws Equip a gun and approach and enemy. Push Punch +Kick to perform a
throw. Your character will pump a few rounds into them. You can shoot agents this
way.
Gun counters When fighting hand-to-hand, push the fire button, and your character
will pull out the gun, shoot the enemy, and exit hand-to-hand combat mode. You
can shoot agents this way too.
Lethal unequip Approach an enemy, barehanded. (This enemy must have a gun
other than a pistol) Tap focus and action. Your character will take the gun right out
of his hands and use it against him. Ghost always leaves the enemy dead after this
move, and Niobe does 50% of the time.
Defeat agents You can defeat an agent by using 3 shots from the grenade
launcher or three offensive grenades (the latter is more difficult) or any
combination, as long as you hit him with three. Then, you can take his gun. It is
the .50AE, the best pistol in the game.

Chinatown and Skyscraper hints:
There are a whole set of levels in CHINATOWN apart from SERAPH'S TEA HOUSE.
Levels in which thousands of Agent Smiths and commandos are chasing you. But
you can't play them if you don't beat Seraph. If you don't manage to beat him you
will skip straight to Logos where you have to escape and shoot down Squidies
(killing machines). It is very difficult to beat Seraph at first. But, it's simple once
you get the trick. You have to use slow-motion to defeat him. If your focus gets
over just run around and escape Seraph's attacks. Your focus will come back
soon. After you beat Seraph you get a new set of levels titled THE SKYCRAPERS.
When you are in these levels remember one thing. Don't attack the agents; just
keep running where the GOAL TRACKER takes you.

Finish An Agent Level Faster:
In Chinatown you have to run from agent Smith or agent Smiths. One of those
levels you will end by getting on a small truck. If you fall on the truck, the game
should start loading for the next level. When the loading stops, you should still be
on that truck. A policeman should be walking by, just wait a second and the
policeman will get shot by an agent. I'm not really sure because I have noy been
on that level in a long time. The Goal Tracker/Destination Arrow should be pointing
right Unless the difficulty setting is on hard. Instead of going right, go left, the
same direction where the bullrt came from that hit the policeman.Like I said, I'm
not sure, but if I'm right there shoul be a yellow or gold fire escape that you can
climb. After climbing the lader there wiil be a door you can enter.

Kill Smith:
If you want to smash Smith you need to select the level were you need to run
from Smith. in 1 of the parts you need to kill some guy's standing by a SWAT van,
from there, climb up to the ladder, instead of going richt go to your left and pick
up the grenade launcher, than turn araund and run to the end of the. when you
are on the half of the platform you see smith jump on the platform, then select
your grenade launcher and activate focus mode. then shoot three times at Smith,
when you've done that you'll see he's wasted, you can take his gun and run. you
can do this with all the smith's you meet nut meek sure you must fire 3 grenades
before he's wasted. Note: You must make sure you'll keep distance between you
and smith or you'll blow yourselve up.

Neck Breaking Attack:
If you are near an enemy, don't make any noise. Sneak up behind them and press
the button that makes your character grab them by the neck. The second your
character trys to grab them, press the focus button and instead of choking the
enemy, you will snap their neck. It's a really cool move!

Running From Agents:
On the chinese level you should find a lot of agents. If they gang up on you use
focus and run forward while pressing the square button. The agents can't grab you
if you are flipping, this is a perfect way to escape.

Double Jump:
Have a gun out and regular jump at an enemy. When you get near the end of your
jump, click the focus button and you will dive forward in focus mode. This is a
great way to cross big gaps.

Backing Up Agents:
If you are being chased by agents, take out a gun and start shooting them. They
will be too busy dodging bullets and it will give you a chance to run!

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.