Syphon Filter Wiki

Who are you? Where's my dad?
Your dad sent me to get you and your mom out of here.
Your jacket says "ATF". Who are you?
I was with the ATF until about an hour ago. My name's Teresa. I'm here to help.
My mom's in labor.
Take me there. I'll get us out. I promise.
Give me a gun to protect myself.
No way. I'll cover you.

Dusty Oakton and Teresa Lipan, Syphon Filter 3


Underground Bunker is the seventeenth mission in Syphon Filter 3. It is the third and final mission where Teresa Lipan is the playable character. It picks up where the last mission left off and continues to depict Teresa's past as an ATF agent. With the satellite data now in her possession, all that is left for Teresa to do is rescuing the Oaktons and getting them out of the area safely.


Mission Briefing

Oakton Compound, Western Montana:
Underground Bunkers

Teresa's Testimony from the Congressional Record

"Getting Oakton's family to trust me was tough, but I knew that the only way to get them off that mountain safely was through their underground bunker system.  A lot of those survivalist compounds had been built right over the top of old mines, giving them access to a network of hidden tunnels."

"I had always thought the Oaktons were more paranoid than most because they had created an entire compound down there.  Looking back, I guess it wasn't so paranoid.  It was hidden pretty well, but the NSA hitsquads were coming fast, and I not only didn't know the way, but had a pregnant woman in tow, and she wasn't moving all that fast."


When Teresa Lipan reaches the bunker, she is met by a suspicious Dusty Oakton who demands to know who she is and his father’s whereabouts. Teresa replies that his father sent her to rescue him and his mother, Debbie Oakton, in order to gain his trust. Dusty then mentions that his mother is in labour to which Teresa requests asks him to take her where she is and assures him that she will get them out of there. Dusty then leads the way towards Debbie’s location with Teresa protecting him along the way from the NSA agents, who have managed to break into the bunker. Dusty also sets up explosives to slow the NSA agents down. He also trusts Teresa enough to allow her to get some supplies and weapons in the bunker. He also gives her infrared goggles to go through the darker paths of the bunker.

When they reach their destination, Debbie asks his son who Teresa is and where his father is. Dusty replies that Teresa is there to rescue them and that she can trust her, even going as far as calling her a friend. Teresa informs Debbie that they need to get out of there immediately because the NSA have managed to break into the bunkers and the security doors won’t hold them out for much longer. Because Debbie is in preterm labour (barely 30 weeks) and thus immobile, she asks Teresa to go into the food cooler room to get the first aid kit containing terbutaline so that she can administer it to Debbie, which will delay her labor and allow her to move. While Teresa goes to find the first aid kit, Dusty stays with Debbie to watch over her.

After finding the first aid kit and going back into Debbie’s room, Teresa manages to kill a few NSA agents who are attempting to kill all three of them. Dusty also manages to arm himself with an M-16, which he obtained from a supply closet. Teresa then gives the terbutaline shot to Debbie, allowing her to move albeit at a very slow pace. Teresa then escorts Debbie while protecting her from the NSA agents. Meanwhile, Dusty goes to the computers to back up data files. After backing up the files, Dusty destroys the computers and proceeds to help Teresa escort Debbie to the main room. When they reach the room, Dusty sets off some explosives in the entrance to slow the NSA agents down “for good”. Dusty then opens the secret passage (behind a US flag) so that they can go in and escape the bunker through the ladder. Before joining them, Teresa kills a few more NSA agents who have managed to get in the room through openings in the ceiling. Teresa then contacts Gabriel Logan to pick them up.

Vince Hadden's death

Back at the Senate testimony, Teresa tells Vince Hadden that Gabe lifted her and the Oaktons out of there with a chopper. Hadden then asks her what she has been doing ever since faking her death by Jason Chance. She replies that she has been mostly pursuing Mara Aramov. She then tells Hadden that since Aramov thought that she was dead, she wasn’t watching for her to cover her tracks as she usually does. As Mara Aramov sneaks into the room, Teresa then states that the most interesting place she found Aramov was in Hadden’s office where they were talking with one another, exposing Hadden’s connections to Aramov and his involvement with the Syphon Filter conspiracy through the Agency and the Consortium. Officers then show up with Gabriel Logan to arrest Hadden but Aramov shoots everyone in the room, killing Hadden and wounding the officers (under orders from the true Consortium leader Mihai Niculescu, who deems Hadden to be useless to him at this point, thanks to Teresa's testimony). Aramov then exits the room, with Gabe following suit. Teresa stays behind to tend to the wounded officers.


Follow Dusty down the tunnel, when he stops to plant something immediately go past him because he is setting explosives which will go off when he's done.  After that, follow him down until he stops so you can get some supplies, there is a Falcon on the green-lit cave on your left.  Go back to where Dusty is and go down the cave to the right, there are four NSA agents here so take them all out.  Follow Dusty down until he stops in an extremely dark cave, take out the two NSA agents that appear and he'll give you some night-vision googles to help you see.  Take the M-79 in the box on your left and follow Dusty down some more tunnels until you get to a spiral ramp-like structure, shoot the two NSA agents in here and continue on.  You'll get to an underground room with two more agents, kill them both and pick up the Flak Jacket in the box on the right.  Afterwards, follow Dusty to the room where Debbie is.

Exit the room where the Oaktons are, facing away from the tunnel that leads to the room turn left and enter the first left corridor, you should be in a room with computers.  Exit it through the tunnel on the right, turn right and head down the very last tunnel on the right, (it should lead down).  You'll see two grey doors, press Action to kick them open and the First-Aid kit is on the left. Return to the Oaktons taking out all NSA agents you run into.

Protect Debbie, ignore Dusty since it's Debbie you want to protect.  Follow her as she walks and take out any NSA agent daring enough to attack, soon she will enter an elevator and all three of you will ride down a level.  Follow Dusty, since he will attack with you, to clear the path ahead of any NSA agents and eventually you'll get to a conference room.  Dusty will set-up some charges and two more agents will run through the doorway, kill them both and Dusty will set off the charges, escape through the secret path he opens to finish the mission.



  • This level is the last flashback mission of Syphon Filter 3. The following levels (and indeed the last two missions of the game) take place in the present.
Main Characters Anton Girdeux  · Edward Benton  · Erich Rhoemer  · Gabriel Logan  · Jonathan Phagan  · Lian Xing  · Mara Aramov  · Thomas Markinson
Minor Characters Alec Kabanov  · Ellis  · Jenkins  · Jorge Marcos  · Pavel Kravitch  · Richard Erikson  · Vince Hadden  · Vladislav Gabrek
Enemies Georgia Street Terrorists  · Flaming Enemy  · Girdeux's Terrorists  · Pharcom Bodyguards
Organizations Black Baton  · CBDC  · Pharcom  · The Agency
Missions Georgia Street  · Destroyed Subway  · Main Subway Line  · Washington Park  · Freedom Memorial  · Expo Center Reception  · Expo Center Dinorama  · Rhoemer's Base  · Base Bunker  · Base Tower  · Base Escape  · Rhoemer's Stronghold  · Stronghold Lower Level  · Stronghold Catacombs  · Pharcom Warehouses  · Pharcom Elite Guards  · Warehouse 76  · Silo Access Tunnels  · Tunnel Blackout  · Missile Silo
Weaponry 9mm  · .45  · Air Taser  · BIZ-2  · C4 Explosive  · Combat shotgun · G-18  · Gas Grenade Grenade  · HK-5  · K3G4 Assault Rifle  · M-16  · M-79  · Nightvision rifle  · PK-102  · Shotgun  · Sniper Rifle
Gadgets Card Key  · Flak Jacket  · Flashlight  · Viral Antigen  · Viral Scanner
Vehicles UH-60 Blackhawk
Conflicts Washington D.C. Attack  · First Investigation of PHARCOM  · Destruction of Rhoemer's Base  · Sabotage of Rhoemer's Cathedral  · Kazakhstan Missile Incident
Transcipts Georgia Street  · Destroyed Subway  · Main Subway Line  · Washington Park  · Freedom Memorial  · Expo Center Reception  · Expo Center Dinorama  · Rhoemer's Base  · Base Bunker  · Base Tower  · Base Escape  · Rhoemer's Stronghold  · Stronghold Lower Level  · Stronghold Catacombs  · Pharcom Warehouses  · Pharcom Elite Guards  · Warehouse 76  · Silo Access Tunnels  · Tunnel Blackout  · Missile Silo
Main Characters Dillon Morgan  · Elsa Weissinger  · Gabriel Logan  · Jason Chance  · Lawrence Mujari  · Lian Xing  · Lyle Stevens  · Mara Aramov  · Steven Archer  · Teresa Lipan  · Thomas Holman  · Thomas Markinson  · Uri Gregorov
Minor Characters Carter  · Colorado Bridge Bombing Commander  · Davies  · Derek Falkan  · Dobson  · Eschelman  · Ferguson  · Gershon  · Imposter Gregorov  · John Ramirez  · Jonathan Phagan  · Kowalski  · Mr. Cochran  · Shi-Hao  · Thompson  · Unnamed Airman  · Unnamed Doctor  · Vince Hadden  · Vladimir Nedobryi
Missions Colorado Mountains  · McKenzie Airbase Interior  · Colorado Interstate 70  · I-70 Mountain Bridge  · McKenzie Airbase Exterior  · Colorado Train Ride  · Colorado Train Race  · C-130 Wreck Site  · Pharcom Expo Center  · Morgan  · Moscow Club 32  · Moscow Streets  · Volkov Park  · Gregorov  · Aljir Prison Break-In  · Aljir Prison Escape  · Agency Bio-Lab  · Agency Bio-Lab Escape  · New York Slums  · New York Sewer  · Finale
Locations Club 32  · McKenzie Airbase  · Rocky Mountains, Colorado
Terrorists Spooks  · Unit one
Multiplayer Abandoned Bank  · Catacombs  · Kazakhstan Warehouses  · New York Garage  · New York Slums  · Park Hedge Maze  · Park Jungle Gym  · Pharcom Expo Center (multiplayer)  · Rooftops (multiplayer)  · Small Village (multiplayer)
Weaponry .45  · 9mm  · 12 Gauge  · Air Taser  · BIZ-2  · C-4 Explosive  · Combat Knife  · Crossbow  · G-18  · H11  · Hand Taser  · HK-5  · Incendiary Grenade  · K3G4 Assault Rifle  · M-16  · M-79  · Nerve Gas Grenade  · Nightvision rifle  · PK-102  · Sniper Rifle  · Tear Gas Launcher  · The Flame-Thrower  · UAS-12  ·
Gadgets Binoculars  · Camera Scrambler  · Cellular Modem  · Flak Jacket  · Flashlight  · Nightvision Goggles  · Transponder Locator
Vehicles C-130 Hercules  · F-22 Raptor
Conflicts Raid on the C-130 Wreckage  · Escape from Mackenzie Air Force Base  · Second Investigation of PHARCOM  · Meeting with Uri Gregorav imposter  · Rescue of Uri Gregorav  · Search for Syphon Filter antidote  · Escape from New York City
Main Characters Gabriel Logan  · Lian Xing
Minor Characters Ellis  · Nigel Cummings  · Silvers
Missions Hotel Fukushima  · Costa Rican Plantation  · C5 Galaxy Transport  · Pugari Gold Mine  · Pugari Complex  · Kabul Afghanistan  · S.S. Lorelei  · Aztec Ruins  · Waterfront  · Docks Final Assault  · Convoy  · The Beast  · Australian Outback  · St. George Australia  · Paradise Ridge  · Militia Compound  · Underground Bunker  · Senate Building  · DC Subway
Weaponry .45  · 9mm  · Air Taser  · AU300 Heavy Barrel  · BIZ-2  · Combat Knife  · Crossbow  · Falcon  · G-18  · H11  · HK-5  · K3G4  · M-16  · M-79  · MARS  · Nightvision rifle  · PK-102  · Shotgun  · Spyder  · Tear Gas Launcher  · UAS-12
Multiplayer maps Afghanistan  · Computer center  · Izmalavio Park  · McKenzie Air Force Base  · Paradise Ridge  · Rhoemer's Stronghold  · S.S. Lorelei  · Training Simulator  ·
Multiplayer characters Agency operative  · Anton Girdeux  · Bag Lady  · CBDC operative  · Corpse  · Elsa Weissinger  · Erich Rhoemer  · Evil scientist  · Gabe Logan  · John Ramirez  · Jonathan Phagan  · Jorge Marcos  · Lawrence Mujari  · Lian Xing  · Mara Aramov  · Military Police  · Monk  · Ninja Gabe  · Russian Bodyguard  · Spook  · SWAT Officer  · Teresa Lipan  · Terrorist  · Unit One  · Uri Gregorov  · Virtual test subject  · Vladislav Gabrek
Minigame types Assassination  · Biathlon  · Demolition  · Elimination  · Thief
Minigame maps China Exhibit  · Colorado Bridge  · D.C. Subway  · Military Base  · New York Slums  · Phagan's Warehouse  · Rhoemer's Fortress  · Washington Park  · Whispering Woods Mortuary
Conflicts Assassination of Shi Hao  · Costa Rican Incident  · Investigation of Pugari Complex  · Soviet-Afghan War  · First Destruction of the SS Lorelei  · Investigation of Erich Rhoemer  · Abduction of Elsa Weissenger  · Assassination of Commander Silvers  · Paradise Ridge Incident  · Attempted Apprehension of Mara Aramov
Main Characters Gabriel Logan  · Lawrence Mujari  · Lian Xing  · Mara Aramov  · Teresa Lipan
Minor Characters Alima Haddad  · Andre Proust  · Elsa Weissinger  · Gary Stoneman  · Gina Hunter  · Imani Gray  ·Jean Fournier  · Maggie Powers  · Mikhail Pulikovsky  · Mikhas Ivankhov  · Oleg Petrenko  · Rodion Ushakov  · Soren Masson  · Vladik Savin  · Vladimir Zhidkov  · William Crusher  · Yegor Leonov  · Yuschenko
Missions IPCA European Command: Training Centre  · Carthage, Michigan: Quarantine Zone  · Carthage, Michigan: Warehouse District  · Carthage, Michigan: Carthage Mall  · Pescara, Italy: St Cetteo's Square  · Mazyr, Belarus: Krivorozhstal Mill  · Mazyr, Belarus: Belaya Vezha  · Tash, Kumyr, Kyrgysztan: Saydahmat's Village  · Sana'a, Yemen: Arms Bazaar  · Sana'a, Yemen: Taherir Palace  · Minsk, Belarus: International University  · Samaschki, Chechnya: Ivankov's Home  · North Atlantic: Lorelei Salvage Rig  · Tokyo, Japan: Murukawa Tower  · Taguang, Myanmar: Irawaddy Basin  · Zurich, Switzerland: Niculescu Funds Tower  · Budva, Montenegro: Niculescu's Villa Estate  · Kiev, Ukraine: Chechen Terrorist Base
Organizations IPCA
Weaponry Beta Weapons  · C11  · China Type 56  · Combat shotgun  · FAL  · FAMAS  · G 33E  · GAWS 12 gauge  · K-BAR  · M1 Super 90  · Riot shotgun  · Shot Defender  · ShotHammer  · Silenced . 44  · Slug Defender  · SlugHammer  · SPA-12 shotgun  · SPA-15 shotgun  · Stava M70 B1  · SSG 550  · Sweeper 12 gauge
Conflicts ALA Assault on Carthage  · Assassination of Dimitri  · Sabotage of CDP Operations  · Transaction on Kyrgysztan  · Assault on Yemen  · Raid on Jandran's Labs  · Investigation of Chechen Genocide  · Second Destruction of the SS Lorelei  · Assault on Murukawa Industries  · Recovery of Imani Grey  · Raid on Meta Global Headquarters  · Raid on Niculescu's Estate  · Showdown with the CDP  · Assassination of Mara Aramov and Elsa Weissenger
Main Characters Gabriel Logan
Minor Characters Engineer  · Goran Zivmović
Weaponry FAMAS  · K-BAR  · Silenced . 44  · SSP 90
Act I. Fire and Ice Insertion Point Alpha  · Red Jack  · Finding Freeman  · A Man Without Power  · Freeman's Files
Act II. Blood and Oil Under NORAD's Nose  · Security Section D  · Kreisler's Garden  · Freeman's Answer
Act III. Ancient History Old Friends  · Memories
Act IV. Saving Private Janzen Forged Under Fire  · Traitor in our Midst  · The Ultimate Sacrifice  · The Trojan Horse
Act V. Root of All Evil Fist Full of Rubles  · Blood Money
Act VI. Touchstone Meeting with Fate  · Into the Abyss
Act VII. Singularity Red Section  · Drowning  · Event Horizon  · Matter's End
Bonus missions Goodnight Sweetheart  · KemSynth Tower  · Sana Yemen  · Birds of a Feather  · Jimmy Zhou's Army
Multiplayer maps Canyon  · Detroit  · Refinery  · Shanty town  · Weapons plant
Multiplayer modes Free for all  · Objective  · Rogue agent  · Team deathmatch
Conflicts Red Section Assault on KemSynth Petroleum  · Investigation of KemSynth Botanics  · United Nations Assault on Tuzla Munitions  · Investigation of Yavlinsky  · Transaction on Germany  · Red Section Takedown  · Assassination of Mara Aramov and Elsa Weissenger  · Faceoff with Jimmy Zhou
Main Characters Gabriel Logan  · Lawrence Mujari  · Lian Xing  · Teresa Lipan
Weaponry K-BAR  · SG-10 Bolt Pistol  · Silenced . 44  · SSP 90
Act I. Cargo Hold 5 Pirates of Somalia  · Going Under  · Ocean's Five  · Sea of Darkness
Act II. Terminal Drift What Lies Below  · Depths of Darkness  · Dead Currents  · Drowning
Act III. Crimson Flood Missing Friends  · Found Enemies  · Nowhere To Run
Act IV. Tyorma Redemption Trinidad  · Into The Cold  · Deadly Cargo
Act V. Shifting Sands Operation Canyon Storm  · Our Hidden Past  · Desert Flames
Act VI. Shattered Destiny The Long Descent  · Powerless  · Disintegration  · Leading The Blind  · With Violent Intent
Bonus missions Killing Time  · Lian's First Time  · Shadowed  · Behind The Scenes  · Left Behind
Multiplayer maps Canyon  · Casino  · Depot  · Detroit  · SRefinery  · Shanty town  · Village
Multiplayer modes Free for all  · Retrieval  · Rogue agent  · Team deathmatch  · Sabotage
Conflicts Assault on the St. Helens  · Raid on the St. Helens' Wreckage  · Spetsnaz Incursion on Azerbaijan  · Escape from Gebel Tyorma  · Raid on Bitar's Bunker  · Faceoff with al-Jamil  · Assassination of Qwan Tak