Find air-taser
After you have gotten the transponder, head to the towering rocks to use it, stop right before you get there. You will notice 2 guys talking and kinda guarding where you need to use your transpoder. This is where you will find a strange small square rock. (About the size of Gabe, your character. Climb on to of the rock. Now turn around drop down and grab the OTHER side. You will see a platform. On it will be an air-taser.
Find the H-11
Go to the first area where you found Chance. That should be right beside a "WATERFALL". Go to the edge of the waterfall. Make sure you are on the side that Chance was/is on. Now turn around drop down and grab the edge that you were on. Now you should be hanging OVER A HOLE. IF NOT ALIGN YOURSELF TO WHERE YOU ARE. Finaly drop down. You should be standing in a cave. Inside you will find The H-11.(To get out just simply go to the edge of the cave and face the other side of of the waterfall, now turn around and jump up.
How to kill Archer
To kill archer first get the gun in the helicopter, but if he shoots you first get the armor in the helicopter. After you've gotten the gun, shoot him until he is at the back of the helicopter where the blade is. If he hits the blade, he'll die. There's no other way to kill him.
Mission Secrets, and what they unlock
Mission Secrets, and what they unlock
Mission 1 Colorado Rockies
When you find the H11 crate in the cave near the waterfall ravine you will unlock the "Colorado Rockies" arena.
Mission 3 Colorado Interstate 70
When you get the Binoculars out of the crate in the back room of the first tunnel you will unlock the "Caves" arena.
Mission 8 C-130 Wreck Site
Kill Archer with one shot as he rides the chopper (good luck) and you will unlock the "Jungle" arena. Also, if you beat this mission in less than 3 minutes you will unlock the Syphon Filter 1 characters for 2 Player mode.
Mission 9 Pharcom Expo Center
When you find the Girly Mag in the locker you will unlock the "Pharcom Incubator Lab" arena.
Mission 11 Moscow Club 32
If you kill all three body guards on the dance floor in the beginning before they toss grenades you will unlock the "Disco Basement" arena.
Mission 12 Moscow Streets
Get the PK-102 from one of the white cars that try to flatten you and you will unlock "Rhoemer's Bunker" arena.
Mission 13 Volkov Park
If you can get to the first car before the agent blows it up you'll find a Biz-2 inside. This will unlock "Surreal" arena.
Mission 15 Aljir Prison (Break-in)
If you can make it through the whole level without the crossbow you'll unlock the "Aljir Prison" Arena.
Mission 18 Agency Bio-Lab (Escape)
When you enter the Operating Room you will unlock the "Agency Computer Lab" arena. You get to the Operating room by entering the ventilation shaft that you exited last in the previous mission -not the second one that leads out into the hallway.
Mission 19 New York Slums
Find the Dirty Laundry in the washer in the burning building. This will unlock "D.C. City Park" Arena.
Mission 20 Slums District
If you make it to the top of the stairway in the parking garage you will find a crate with an M-79 inside. This will unlock the Syphon Filter 2 characters for 2 Player mode.
End Level
Pause the game and highlight the map option but do not press, hold down right, L2, R2, square, x, circle at the same time.
Disco Underground multi-player stage
In the Disco 32 level, after killing the bodyguard on the catwalk, three more guards will run in the door. Kill all three before they can throw a grenade at you. None of them have flak jackets. When you kick open the doors to the next dance floor with big speakers in the corners, you will need to kill these three guards before the guard above you can throw a grenade. Save your BIZ-2 ammo for him, run to the right, and hide behind the speaker. Kill the two guards on the floor. As the guard above you runs around so he can throw a grenade, use the BIZ-2 for a head shot. He does have a flak jacket.
D.C. City Park multi-player stage
Find the dirty laundry in the New York City Slums District level in one of the washing machines in the first Sniper Building of the level. This is the building that is similar to the slums district level in multi-player mode.
Surreal multi-player stage
In Volkov Park, kill the first guard to the left very quickly before he destroys the car. After you kill him, collect the BIZ-2 in the car he did not destroy.
Rockies multi-player stage
Find the H11 sniper rifle on the first level (Colorado Rockies) to unlock the Rockies multi-player map. The H11 is near the waterfall and ice arch where you first meet Chance. Instead of jumping over the waterfall chasm, hang from the edge of the chasm and drop down into the tunnel. The H11 is in there.
Prison multi-player stage
Complete the Aljir Prison Break-In level without using the crossbow. You will have to sneak and roll up to the first man before he makes it out in the open. Roll a lot, but do not roll into him. You also cannot run or he will turn around. You should be able to run up very close to the male guard and the female guard who chased down the second prisoner. The last guard turns and looks around quite a bit. Walk against the left wall, and hide behind the support. He will walk out past you, and then you can get him.
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