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Select + L2 + Circle + Square + X (in that order).
A sound will confirm correct code entry. Enter the options screen and select "Cheats". Super Agent mode allows enemies that have flak jackets to be killed with a single shot.
Right + L2 + R2 + Circle + Square + X (simultaneously).
Then, enter the options screen and choose the "Cheats" selection.
Right + L2 + R2 + Circle + Square + X
A sound will confirm correct code entry. Enter the options screen and select "Cheats".
Up+Select+L1+R2+Square+Circle+X at the same time.
Finishing certain levels on hard mode unlocks bonus movies.
Then hold:
Right + L1 + R2 + Circle + X.
A sound will confirm correct code entry. Enter the options screen and select "Cheats".
You will be able to unlock movies as you proceed through the game. Four Additional movies will be available once you beat the game on Hard.
Note: To view the following movies you must use the MOVIE THEATER code above.
There are a total of 28 characters, but only 10 of them are initially available. The other 18 characters are unlocked through 2 secrets in the latter half of the game. What they are is unclear at this time.

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Find more cheat codes, hints, walkthroughs, guides, FAQ and tricksAt the First level (the rookies) when you are about to go out of the cave to gaet the "C4" there are many enemies outside. One of them will throw a granade but when the GIs got to the edge of the cliff go back into the cave they will be alive even the enemy had thrown a granade when you got out.
Submitted and Fully Tested by:John Conrad

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Find more cheat codes, hints, walkthroughs, guides, FAQ and tricksSyphon Filter 2
Get Expert Mode
Go to the title scree, highlight the 1 player option and then HOLD Up + L1 + R2 + Select + Circle + X + Square
Hard Mode
In the in-game options menu, you can view movies that you
have unlocked during your progress through the
game. You'll see 2 extra movies that you
couldn't get by playing through the first time. To unlock
these movies you must play the game in 'HARD' mode and to
get this mode, do the following. Go to the title screen
and then New Game, press Up+Select+L1+R2+Square+Circle+X
at the same time. Finishing certain levels on hard mode
unlocks bonus movies.
Info submitted by greecerlz on Friday, March 17, 2000 at 09:36:49
2-Player
Arenas and Characters
There are 10 hidden items that must be picked up in the
single player mode to open the 10 locked 2 player
arenas. There are 20 Arenas in all. Some of these
hidden
items, such as the Binoculars, are
inventory items and others such as the Girly Mag and
Dirty Laundry cannot be seen in your inventory when
picked up.
There are a total of 28 characters, but only 10 of
them are initially available. The other 18 characters are
unlocked through 2 secrets in the latter half of the
game. What they are is unclear at this time.
Info submitted by greecerlz on Friday, March 17, 2000 at 09:36:49
More
Multiplayer Arenas
Pharcom Lab Multiplayer Arena
- in the expo center level, shortly after passing through
the mars exibit, you will come across two gaurds looking
at a dirty magazine. Wait a second and kill the
guards. When they are both dead collect the dirty
magazine to unlock the Pharcom Lab multiplayer arena.
DC Park Multiplayer Arena
- In the third last level of the game, Slums, play
through for a while until the part where you have to help
the swat team kill the snipers. When you get there,
there is a building with smoke rising out of the
entrance, enter the building. When you enter
carefully go up the ramp inside the building until you
reach what looks to be old washing machines. After
a radio signal, go to the last machine in the row.
Press triangle to pick up the dirty laundry. You
have now unlocked DC park
Info submitted by graVity on Wednesday, March 22, 2000 at 15:17:39
Jungle
level in Multiplayer
To get the Jungle level in Multiplayer at the end of the
C-310 Wreck Site [or whatever it is called!] shoot Archer
in the head once. The sniper rifle will work the best.
You may only shoot him once and that is a head shot. Now
save your game and you will have the Jungle level!
Level
Select
Pause the game, highlight the "Map" option,
then hold Right + L2 + R2 + Circle + Square + X
(simultaneously). Then, enter the options screen and
choose the "Cheats" selection
Movie Theatre
First pause the game and highlight the Briefing Option. Now hold Right + L1 + R2 + Circle + X. Now go to options and pick the cheats
Ammo and
gun(gun later revealed in level)
In the first level(the rockies) there is a tunnel where
the water fall is. Go on the side
with the flare thing and go jump over the cliff, dont
worry, he automatically jumps over. When you do that,
back up so you hang off, Then drop down. Go to the end of
the tunnel which there are no guys in. Get 300 ammo for
the HK11. It is an automatic silenced sniper rifle.(make
sure you are on the other side that the fire is not on!
Killing
Chance
First of all, he is wearing full body armor so u cant
attack him with any of your current weapons. Ok now
when u start the game head out of the right door and roll
and run towards the helicopter. Once you get there
u should see an ammo box with the UAS12 or something like
that. ( A gas-grenade type of gun). After you get
that roll under the helicopter's back end (being careful
not to go into the spinning blades.) Now if you
have been shot by chance run over to the opposite side of
the helicopter and grab the flak jacket in the ammo
box. By the time you have completed this, chance
probably has rolled under the helicopter after
you... Take the grenade type gun and start shooting
him into the chest, making sure he is in line with the
rotating blades on the back end of the copter. He
will be sliced, diced, and chopped....Congrats you have
just beat the game!!!!!! Enjoy the cinematic clips.
Air Taser
in level 1
When you go to the highest point on level one
and get the tansponder to work. When you areon your way
back look to your left and and go to the edge and crawl
down to hang on to the cliff( press walk when going to
the cliff to crawl down and hang) move left and you will
find a box which has the air taser.
Colarado
Rockies/Mounties in Multiplayer
To select the Colarado Rockies as a selectable level in
multiplayer make it to where Chance is. Then get the H-11
by the waterfall. "Save and Quit" your game at
the Options mode and save it to your memory pack. Then
quit and you will have the Colarado Rockies level or
whatever the first level is called.
Pharcom
Expo Center For Multiplayer
To get the Pharcom Expo Center for multiplayer, you have
to get a girly mag. It is located in the locker
where the two guards are talking about how hot one of the
chicks are in the magazine. When you tazer the
guard, get right infront of the locker where he is at and
get the girly mag.
Super Agent
Mode
Pause the game. Highlight weaponry, hold
L2+select+circle+square+X (simultaneously). If done
correctly you should hear a sound. Then go to options and
select "cheats"
Info submitted by Jimmy Nguyen on Friday, April 7, 2000 at 10:01:26
Extra Gun
In the first level their is an easier way to get the H11
from under the waterfall. Just simply get as close to the
edge as you can, and roll in by using the O button.
All
multiplayer Characters
In the new york sewer level you get to the checkpoint
where you shoot the 4 guys with m-79s.you go up the
stairs and shoot the agents. then when you see a door
keep going up the stairs.shoot the rest of the guys with
your m-79.when you reach the top of the stairs there will
be a case.Open it . it is a m-79.Gabe will say got
it.finish the level and you have all characters
Info submitted by thebums4 on Saturday, March 25, 2000 at 22:30:46
Goofies
(more characters)
At the second level after you get your gear back,you have
to be very quick. Sneak up to the guard and taser
him,then open the door by pressing the switch,then run to
the door and go to the second left recessed door and wait
for the guard. Taser him before he even gets close to the
intercom. If you wasted no time you should be able to see
2 guards walking down the corridor. Run to the second
left window and wait for the guard to walk down the
corridor then taser him too,then run toward the exit. If
you did the whole thing right and wasted no time in the
this level, she should say "got it". You will
more muiltiplayer characters including the "Bag
lady".
Rhomers
Bunker in multiplayer
In the stage Moscow Streets after the two cars come
speeding at your character dodge them and go back to
where the cars were going then in the police car on the
right you will find a PK-102 pick it up and Lian will say
got it and Rhomers Bunker will be released as a
multiplayer stage!!!
Two for One
deal
When there are 2 gaurds patrolling and you cant be
caught, wait for the gaurds to stand side by side where
you can only see one of them. Take out the sniper
rifle and shoot the first one in the obvious place (the
head)and it will go through his head and into the other
gaurd's head, and you only had to waste one bullet!
And on top of that you didnt waste time or get caught.
Sniper
rifle on first level
On the first level you can control where you land with
your parashoot (or however you spell it) now control
yourself in the direction of the 3 men and the flares try
and land yourself on top or so your hanging off of the
cliff right above them and there it is in the ammo box.
Get the h11
at level 1
At the first level at the beginning (where gabe
parachuts) aim the parachute to the rock where the gi is
sitting then hit down to get air, you should get on top
of the rock where a chest and a h11 are waiting!!!
How to get
caves in multiplayer mode!
The level is 1-70 mountain bridge,first go right quietly
there will be a door go into it by pushing triangle next
go left and there will be another door open that then you
will see a box in the right corner of the room in it is
binoculars get them and then you have unlocked the caves!
Get Characters From Syphon Filter 1
Finish the C-130 wreck site and unlock characters
from the original Syhon Filter

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