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Old World Blues (add-on)

FO76 publicteam xpd.pngFor the quest appearing in this add-on, see Old World Blues (quest).

There is an expression in the Wasteland: "Old World Blues". It refers to those so obsessed with the past they can't see the present, much less the future, for what it is.— Doctor Mobius and Doctor Klein, Old World Blues

Old World Blues is the third add-on for Fallout: New Vegas, developed by Obsidian Entertainment and published by Bethesda Softworks.


In the years before the Great War, Big Mountain had been the home to the brightest minds of the 21st century. Scientists of vision were drawn to the facility to tackle the greatest technological challenges of the era. They sought to create a new world, fueled by technology, for the benefit of all mankind.

Sonic emitters, space age alloys, DNA hybridization, force field particle research, Auto-Doc advances in cranial, cardiac, and trauma surgery... the hopes and dreams of a century became realities in the electronic forges of Big Mountain.

The nucleus of this research was the Dome, a huge stone facility that held the labs of every science known to man. It was a think tank where no problem could not be solved, where no question could not be answered.

The Great War brought a new energy to Big Mountain and its scientists. Although sheltered from the frontlines, the scientists waged their own war, fighting their battles at the atomic level. Equations and calculations marched endlessly across chalkboards and computer terminals toward one solution: Winning the war.

For years, the minds and computers of Big Mountain were a blaze of trajectories, weapon schematics, and nuclear theories. The problems began to outpace the solutions, first geometrically, then exponentially. As the war escalated, so did the questions.

On the night of October 23rd, 2077, the scientists received an answer that put all their questions to rest. In the aftermath, Big Mountain's silent experiments went to sleep, their creators slowly dying in the new world that had been left behind.

And the great stone in the middle of the Big Empty lay untouched, filled with countless technological wonders... Wonders that, in the end, had been answers to the wrong question.
Doctor Mobius, Old World Blues Intro


In Old World Blues, the Courier is abducted by the Think Tank, a group of pre-War scientists that have replaced their bodies with machines. Learning that the Think Tank has removed and subsequently lost the Courier's brain, the Courier aids the Think Tank scientists in fighting Dr. Mobius, the rogue scientist currently in possession of their missing brain. Exploring the Big MT facility, the Courier rediscovers lost technology and fights off Lobotomites, Robo-Scorpions, and more.

Finally meeting Dr. Mobius, the Courier learns that he is not actually evil, but has messed with the Think Tank's memories and constantly threatens them in order to keep them from experimenting on the entire wasteland. By stealing the Courier's brain, Dr. Mobius was preventing the Think Tank from using the brain's unique properties to move their own brains into host bodies and escape the crater. After choosing what to do with Mobius and reacquiring their brain, the Courier returns to the Think Tank and can choose to either convince them to stay in Big MT or to kill them.



Robots and computers







Schematics & recipes


Weapon mods

Other items

World objects


Big Empty.jpg
Image Name Cell Name
Old World Blues External 4.jpg Big MT
Big MT east tunnel.jpg Big MT East Tunnel NVDLC03SLTunnelEast
FNVOWB Location Big MT North Tunnel.webp Big MT North Tunnel NVDLC03SLTunnelNorth (ext.)
NVDLC03SLTunnelNorthINT (int.)
Big MT west tunnel.jpg Big MT West Tunnel NVDLC03SLTunnelWest (exterior)
NVDLC03SLTunnelWestINT (int.)
Construction site.jpg Construction Site NVDLC03SLConstruction
ElijahsWatch.jpg Elijah's Watch NVDLC03SLElijahsWatch
FNVOWB Location Forbidden Zone Dome Entrance.webp Forbidden Zone Dome Entrance NVDLC03DomeForbidden (ext.)
NVDLC03X42 (warfare facility)
NVDLC03ForbiddenZone (dome)
FNVOWB Location Hazmat Testing Ground.webp Hazmat Testing Ground NVDLC03SLHazmat
Higgs Village interior.jpg Higgs Village NVDLC03SLVillage
NVDLC03SLVillageOINT (#00)
NVDLC03SLVillageKleinINT (#101)
NVDLC03SLVillageBorousBINT (#103 bas.)
NVDLC03SLVillageDalaINT (#104)
NVDLC03SLVillage8INT (#108)
FNVOWB Little Yangtze.png Little Yangtze NVDLC03SLLittleYangtze (exterior)
NVDLC03SLLittleYangtzeTowerINT (tower)
Loading station.jpg Loading Station NVDLC03SLLoading
FNVOWB Location Magnetohydraulics Complex.webp Magnetohydraulics Complex NVDLC03SLMHC (exterior)
NVDLC03SLH2OINT (interior)
Mojave Drive-in.jpg Mojave Drive-in MojaveDriveIn
[[File:|100px]] Mysterious Broadcast
FNVOWB Location Mysterious Cave.webp Mysterious Cave NVDLC03SLBloatfly (exterior)
NVDLC03SLBloatFlyCave (int.)
FNVOWB Location Saturnite Alloy Research Facility.webp Saturnite Alloy Research Facility NVDLC03SLSaturnite (exterior)
NVDLC03SLSaturniteINT (interior)
FNVOWB Location Securitron De-Construction Plant.webp Securitron De-Construction Plant NVDLC03SLSecuritron (exterior)
NVDLC03SLSecuritronINT (int.)
Signal Hills transmitter.jpg Signal Hills Transmitter NVDLC03SLCommunications (ext)
NVDLC03SLCommunicationsINT (interior)
FNVOWB Location The Cuckoo's Nest.webp The Cuckoo's Nest NVDLC03SLCuckoosNest (ext.)
NVDLC03SLCuckoosNestINT (int)
The sink1.jpg The Sink NVDLC03TheSinkBalcony
FNVOWB Location The Think Tank.webp The Think Tank NVDLC03DomeThinkTank (dome)
NVDLC03TheSink (The Sink)
NVDLC03ThinkTank (Think Tank)
NVDLC03TheSinkBalcony (balcony)
Ulysses Point.jpg Ulysses' Point NVDLC03SLUlyssesPoint (exterior)
NVDLC03SLUlyssesPointINT (int.)
X-13 VR simulation room.jpg VR Simulation Room NVDLC03X13
FNVOWB Location Waste Disintegration Platform.webp Waste Disintegration Platform NVDLC03SLDisintegration
X-12 Research Center.jpg X-12 Research Center NVDLC03SLX12 (exterior)
NVDLC03SLX12INT (interior)
FNVOWB Location X-13 Research Facility.webp X-13 Research Facility NVDLC03X13Site (exterior)
NVDLC03X13 (testing facility)
NVDLC03X13RepconHQ03 (stealth testing lab)
X-17 meteorological station.jpg X-17 Meteorological Station NVDLC03SLWeatherStation (ext.)
NVDLC03SLWeatherStationINT (int.)
FNVOWB Location X-2 Transmitter Antenna Array.webp X-2 Transmitter Antenna Array NVDLC03SatelliteStation (exterior)
NVDLC03SLSatelliteStationINT (int.)
X-22 botanical garden.jpg X-22 Botanical Garden NVDLC03SLBotanical
X-66 hexcrete archipelago.jpg X-66 Hexcrete Archipelago NVDLC03SLHex
FNVOWB Location X-7a "Left Field" Artillery Launch.webp X-7a "Left Field" Artillery Launch NVDLC03SLArtilleryLaunch (ext.)
NVDLC03SLArtilleryLaunchINT (command center)
FNVOWB Location X-7b "Boom Town" Target Zone.webp X-7b "Boom Town" Target Zone NVDLC03SLArtilleryLanding
FNVOWB Location X-8 Research Center.webp X-8 Research Center NVDLC03X8Site (exterior)
NVDLC03X8Cave (res. test fac.)
NVDLC03X8Main (central facility)
NVDLC03X8School (inst. test fac.)
NVDLC03X8Tunnel (testing fac.)
Y-0 research center.jpg Y-0 Research Center NVDLC03SLRuins
Y-17 Medical Facility.jpg Y-17 Medical Facility NVDLC03SLMedCenter (exterior)
NVDLC03SLMedCenterINT (int.)
FNVOWB Location Z-14 Pepsinae DNA Splicing Lab.webp Z-14 Pepsinae DNA Splicing Lab NVDLC03SLCazador (exterior)
NVDLC03SLCazadorINT (interior)
FNVOWB Location Z-38 Lightwave Dynamics Research.webp Z-38 Lightwave Dynamics Research NVDLC03SLHologram (exterior)
NVDLC03SLHologramINT (int.)
FNVOWB Location Z-43 Innovative Toxins Plant.webp Z-43 Innovative Toxins Plant NVDLC03SLChemical (exterior)
NVDLC03SLChemicalINT (int.)
FNVOWB Location Z-9 Crotalus DNA Preservation Lab.webp Z-9 Crotalus DNA Preservation Lab NVDLC03SLNightstalker (exterior)
NVDLC03SLNightstalkerINT (int.)


The experience points that are rewarded for quests are based on the player character's level upon the quest's completion. The total experience points available for the main storyline quests is anywhere between 3,000 (for levels 1–4) to 22,000 (for levels 45–50). The experience points gained from the side quests range from 75 to 500 per quest.

Image Name Location Given By Reward Form ID
A Brain Best Friend.jpg A Brain's Best Friend The Think Tank Doctor Borous Variable XP xx014BF8
The sink.jpg All My Friends Have Off Switches The Sink Sink Central Intelligence Unit Various Sink Services xx0112E3
Coming Out of Her Shell.jpg Coming Out of Her Shell The Think Tank Doctor Dala Various ammunition once per day, Conductor, Wonderglue, pre-War money. xx014C2C
Field Research.jpg Field Research The Sink SCIU Variable XP
Sonic emitter upgrades
Doctor Dala.jpg He Came... And Went The Think Tank Doctor Dala 450 XP xx014C2D
The sink.jpg Influencing People Big MT The Sink Variable XP
Sink services upgraded
Various weapon mods available
Midnight Science Fiction Feature.jpg Midnight Science Fiction Feature! Mojave Drive-in Mysterious Broadcast Variable XP xx002FCA
Old World Blues quest.jpg Old World Blues Forbidden Zone Doctor Klein Big Mountain Transportalponder!
Completion of Old World Blues
Doctor 8.jpg On the Same Wavelength The Think Tank Doctor 8 Variable XP xx014C63
Picking Your Brains.jpg Picking Your Brains The Think Tank Doctor Klein Variable XP xx0121E3
Nvdlc03stealthsuitposter01 d.jpg Project X-13 X-13 Research Facility Doctor Klein Upgraded Stealth Suit Mk II xx006D8D
X-8 research center.jpg Sonic Emitter Upgrade X-8 Research Center Doctor Klein Upgraded Sonic Emitter xx0166E2
FNV Big Empty Side View.png Welcome to the Big Empty The Sink balcony Self Variable XP
Various weapons and Caps (if Speech skill checks are passed)
The Sink as a player home
Doctor 0.jpg What's in a Name? The Think Tank Doctor 0 Variable XP
Scrap Metal
Scrap Electronics
Doctor 0.jpg When Visitors Attack! The Think Tank Doctor Klein Variable XP xx014CFE
Stealth suit Mk II.png X-13: Attack of the Infiltrator! X-13 Research Facility Doctor Klein Various magazines
Chinese Army: Special Ops Training Manual
Energy weapon ammunition
Upgraded stealth suit
X-2 antenna.jpg X-2: Strange Transmissions! X-2 Transmitter Antenna Array Doctor Klein X-2 Antenna xx002FCD
X-8 Data Retrieval Test.jpg X-8 Data Retrieval Test X-8 Research Center X-8 Research Center terminal Variable XP
DNAgent perk
X-8 research center.jpg X-8: High School Horror! X-8 Research Center Doctor Klein Gabriel's Bark xx002FCE


Image Name Task Reward Form ID
FNV Perk Challenge.png Automaton Build a robot bent on destruction 100 XP xx015B04
FNV Perk Challenge.png Cardiac Arrest! Recovered X-13 cardiac regulator sneaky suit! 500 XP xx009DE4
FNV Perk Challenge.png Caza-Death Dealer I Kill 2 Cazadores in Big MT 100 XP xx00DA29
FNV Perk Challenge.png Caza-Death Dealer II Kill 5 Cazadores in Big MT 100 XP xx00DA2A
FNV Perk Challenge.png Caza-Death Dealer III Kill 10 Cazadores in Big MT 100 XP xx00DA2B
FNV Perk Challenge.png Dog Run I - Dog Gone Complete the X-8 Basic Testing Program. 100 XP xx00A446
FNV Perk Challenge.png Dog Run II - Who let the ... Complete the X-8 Advanced Testing Program. 100 XP xx00A447
FNV Perk Challenge.png Dog Run III - Snake Skins Completed the X-8 Testing Program...with Nightstalkers! 100 XP xx00A448
FNV Perk Challenge.png Evil Genius Create an Abomination! 100 XP xx015B03
FNV Perk Challenge.png Klein Destine Dress in a complete set of Dr. Klein's clothes. 100 XP xx009DE1
FNV Perk Challenge.png MT Space Visited every location in the Big MT. 100 XP xx00A44C
FNV Perk Challenge.png Mad Scientist Have an experiment go horribly awry. 100 XP xx015B02
FNV Perk Challenge.png Make Up Your Mind Made up your Mind... about your brain 500 XP xx009DE2
FNV Perk Challenge.png Making Friends Reactivated all of the Sink's robotic assistants. 500 XP xx011956
FNV Perk Challenge.png Mobius Strip Dress in a complete set of Dr. Mobius' clothes 100 XP xx009DE7
FNV Perk Challenge.png Outer Space Dare to venture beyond the Big MT's perimeter... more than once! 100 XP xx00A44D
FNV Perk Challenge.png Outsmarted Complete Old World Blues 500 XP xx009DE5
FNV Perk Challenge.png Spinal-Tapped! Recovered X-8 vertebrae-pulse-de-sensitizer frequency! 500 XP xx009DE3
FNV Perk Challenge.png VR the Champions I - Simulated Complete the X-13 Basic Infiltration Test 100 XP xx00A449
FNV Perk Challenge.png VR the Champions II - Simulacra Complete the X-13 Advanced Infiltration Test 100 XP xx00A44A
FNV Perk Challenge.png VR the Champions III - Hollowed Out Complete the X-13 Robot Compliance Test 100 XP xx00A44B


This section is transcluded from Fallout: New Vegas Perks. To change it, please edit the transcluded page.

Regular perks

Name Level req Other requirements Ranks Benefit Form ID
Atomic! 20 EN 6 1 In irradiated areas, +25% move and attack speed, +2 DT, +2 ST. With excess rad level, AP regen scales from 1.1 times to 1.5 times normal. xx008011
Mile in Their Shoes 20 Survival 25 1 You have come to understand night stalkers. Consuming night stalker squeezin's now grants bonuses to Perception (+1 PER), Poison Resistance (+5), and Stealth (+5 Sneak) in addition to the normal benefits. xx009619
Them's Good Eatin' 20 Survival 55 1 Any living creature you kill has a 50% chance to have the potent healing items thin red paste or blood sausage when looted. xx0098C9
Implant GRX 30 EN 8 2 You gain a non-addictive subdermal turbo (chem) injector. This perk may be taken twice, with the second rank increasing the effect from 2 to 3 seconds and the uses per day from 5 to 10 (activated in the Pip-Boy inventory). xx009D48

Special perks

Name Unlock conditions Ranks Benefit Form ID
Brainless Initial dialogue with Doctor Klein in the Think Tank (optional to keep after completion of OWB if you keep your artificial brain) 1 Head can no longer be crippled, +25% resistance to chem addiction, +5% DT (min +1) xx0098BE
Heartless Initial dialogue with Doctor Klein in the Think Tank (optional to keep after completion of OWB if you keep your artificial heart) 1 Poison immunity, -50% chance to get critical hits from robots, and lesser bonus healing with certain items. xx0098C2
Spineless Initial dialogue with Doctor Klein in the Think Tank (optional to keep after completion of OWB if you keep your artificial spine) 1 Strength +1, DT +1, torso can no longer be crippled. xx0098BC
Big Brained Sink Auto-Doc after Old World Blues is finished (optional to get if you take your organic brain back) 1 The perk is not implemented properly and does not function as intended. It's supposed to grant the following bonuses: Head can no longer be crippled, +10% resistance to chem addiction, +10% DT (min +1). xx015BBA
Cardiac Arrest Sink Auto-Doc after Old World Blues is finished (optional to get if you take your organic heart back) 1 +50% to poison resistance, -25% chance to get critical hits from robots, and bonus healing with certain items. xx015BBB
Reinforced Spine Sink Auto-Doc after Old World Blues is finished (optional to get if you take your organic spine back) 1 Strength +2, Damage Threshold +2 xx015BBC
DNAgent Completion of X-8 Data Retrieval Test 1 All damage done to Nightstalkers is increased by 10%. xx009617
DNAvenger Kill two Cazadores for rank 1, three more for rank 2, and another five for rank 3 of this perk. All kills must be made in the Big MT; cazadores outside the Big MT do not count. 3 All the damage done to Cazadores is increased cumulatively by 10% by rank. xx00DA28
Stealth Suit Mk II (perk) Complete the last challenge of Project X-13 1 The perk is not implemented properly and does not function. +20% increased sneak speed xx00E845

Implant perks

Doesn't count against the Endurance limit of original implant perks.

Name Unlock conditions Ranks Benefit Form ID
Implant C-13 Surgery purchased through dialogue with the Sink Auto-Doc in The Sink for 8,000 caps. 1 Plus 10% damage to Cazadores xx009616
Implant M-5 Surgery purchased through dialogue with the Sink Auto-Doc in The Sink for 10,000 caps. 1 Your crouched movement speed is increased by 20%. xx009614
Implant Y-3 Surgery purchased through dialogue with the Sink Auto-Doc in The Sink for 12,000 caps. 1 Removes any radiation taken from drinking an irradiated water source. xx009615
Implant Y-7 Surgery purchased through dialogue with the Sink Auto-Doc in The Sink for 20,000 caps. 1 +5 health and +2 restored action points through the consumption of food. xx00961A


This section is transcluded from Fallout: New Vegas traits. To change it, please edit the transcluded page.
Image Name Benefits Penalty Form ID
FNVOWB Trait Claustrophobia.png Claustrophobia +1 to all SPECIAL stats when outside -1 to all SPECIAL stats when indoors xx0133AE
FNVOWB Trait Early Bird.png Early Bird +2 to SPECIAL stats from 6AM to 12PM -1 to SPECIAL stats from 6PM to 6AM xx012767
FNVOWB Trait Hoarder.png Hoarder +25 lbs. is added to your total Carry Weight -1 to SPECIAL stats while your total carrying weight is below 160 lbs. xx01276D
FNVOWB Trait Hot Blooded.png Hot Blooded +15% damage when your health is below 50% -2 to Perception and Agility when your health is below 50% xx01276B
FNVOWB Trait Logan's Loophole.png Logan's Loophole Chems last twice as long
Addiction rates are set to 0%
Level cap locks at Level 30 xx01276E
FNVOWB Trait Skilled.png Skilled (Fallout: New Vegas) +5 to all skills -10% to Experience Points gained xx012B86



  • Old World Blues is recommended for the Courier to have reached level 15 or higher, and many enemies level with them.
  • Like all Fallout: New Vegas add-ons, Old World Blues raises the level cap by 5.[Dev 1]
  • Unlike in Dead Money, equipment will not be stripped from the player character at the beginning of the add-on, and it features an open-world setting. There is also no limit to the amount of equipment that can be taken into the add-on.[Dev 2]
  • Companions cannot accompany the Courier to the new location. However, a temporary companion can be created at the X-8 Research Center.
  • A new radio station is added to both the Big Empty and the Mojave.
  • Player housing is available at The Sink, and the player may return to the Big Empty via the Big Mountain Transportalponder!
  • Completion of the add-on does not close off uncompleted side quests.
  • The Courier's brain, spine, and heart are removed by the scientists and held as leverage. At the beginning of the add-on, the spine and heart can be found in The Sink, and after completing the main questline, the brain is placed among them.
  • The sound from the speakers in Dead Money can also be heard at the end of the trailer, and from the speakers in the Little Yangtze prison camp.
  • Some areas, like X-13 Research Facility, contain hanging dolls on a string. These are the same as the swamp totems in the Fallout 3 add-on Point Lookout.
  • Unlike Dead Money or Honest Hearts, all achievements or trophies can be earned in one playthrough without replaying.
  • When in Hardcore Mode, the sleep meter stays at zero unless the Courier sleeps. There may be a delay before the sleep meter starts.

Behind the scenes




Fallout New Vegas Old World Blues DLC trailer


Developer Statements
  1. Fallout: New Vegas developer statements; Matt Grandstaff: DLC Level Cap, 2011 May 3
  2. Fallout: New Vegas developer statements; Chris Avellone: Temporary Equipment Removal, 2011 May 12
  3. Chris Avellone: "I'm really the wrong person to ask. We did try to invent "zero-versions" of a lot of Power Armor for Old World Blues (Power Arms, Power Chassis, etc.) but that got nixxed, alas."
    (Fallout: New Vegas developer statements/Old World Blues; Chris Avellone: Zero Versions, 2018 February 21)
  4. User: "@ChrisAvellone During development of New Vegas, were there plans to incorporate more Desert Ranger/Wasteland references, like the 'fat freak mobster' Tycho mentioned in F1? And later on, was Wasteland 2 to feature NV references, but were cut/decided to be unfitting for the game?"
    Chris Avellone: "No, we only tried to do it with Old World Blues, because part of OWB was supposed to be an homage to Fallout's roots (ex: Giant Robot Scorpitr- er, Scorpion)."
    (Fallout: New Vegas developer statements/Old World Blues; Chris Avellone: Wasteland Homage, 2022 April 9)