Get Expert Mode
Go to the title scree, highlight the 1 player option and then HOLD Up + L1 + R2 + Select + Circle + X + Square
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.
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
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!
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
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!
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.
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"
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
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.
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