Arroyo Tribe (Origin: FO2 Size/Organization: small Technology/Weapons: primitive Goals/Leadership: Elder MO/Alias: find GECK )

Beast Lords (Origin: FOT Size/Organization: medium tribe Technology/Weapons: psychically controlled animals Goals/Leadership: unknown MO/Alias: violent bad guys)

Blackfoot Tribe (Origin: FOVB Size/Organization: exclusive tribe Technology/Weapons: primitive Goals/Leadership: chief MO/Alias: unknown )

BOS: Chicago (Origin: FOT Size/Organization: very large association Technology/Weapons: power armor, prewar military vehicles Goals/Leadership: crusade MO/Alias: defeat enemies and recruit )

BOS: West Coast (Origin: FO2 Size/Organization: highly organized medium sized Technology/Weapons: power armor Goals/Leadership: cult MO/Alias: military technology gathering vault )

BOS: Outcasts (Origin: FO3 Size/Organization: well organized small sized Technology/Weapons: high tech Goals/Leadership: schism MO/Alias: gather technology, purists )

BOS: East Coast (Origin: FO3 Size/Organization: very organized medium sized Technology/Weapons: power armor, Liberty Prime, Tesla Cannon Goals/Leadership: Elder Lyons MO/Alias: sit in the Citadel and eyeball the Enclave recklessly )

Caesar's Legion (Origin: FOVB Size/Organization: well organized medium sized Technology/Weapons: crude chariot vehicles Goals/Leadership: Caesar MO/Alias: slavers in the southwest )

Calculator's Army, The (Origin: FOT Size/Organization: vast perfectly organized Technology/Weapons: high tech Goals/Leadership: The Calculator MO/Alias: destroy all humans )

Church of Atom (Origin: FO3 Size/Organization: small cult Technology/Weapons: none Goals/Leadership: cult MO/Alias: worship a bomb)

Ciphers (Origin: FOVB Size/Organization: small Technology/Weapons: primitive Goals/Leadership: cult MO/Alias: math problems and drawing up and distributing schematics )

Commonwealth, The (Origin: FO3 Size/Organization: unknown Technology/Weapons: extremely high tech Goals/Leadership: unknown MO/Alias: unknown )

Enclave (Origin: FO2 and FO3 Size/Organization: extremely organized size unknown at least vast Technology/Weapons: power armor vertibirds biological weapons Goals/Leadership: sinister conspiracy MO/Alias: the bad guys )

Khans (Origin: FO1 Size/Organization: small tribe Technology/Weapons: primitive Goals/Leadership: none MO/Alias: vicious raids, likely to kidnap girls)

Master's Army, The (Origin: All Size/Organization: exclusive vast tribe Technology/Weapons: varied and heavy weapons Goals/Leadership: cult MO/Alias: super mutants )

NCR (Origin: FO2 Size/Organization: vast highly organized Technology/Weapons: guns Goals/Leadership: President MO/Alias: New California Republic, Two Headed Bear flag of cali)

New Reno Families (Origin: FO2 Size/Organization: jealous close knit business Technology/Weapons: guns, access to heavy/energy weapons Goals/Leadership: $ MO/Alias: Wrights Salvadors and Bishops)

Raiders (Origin: All Size/Organization: None Technology/Weapons: guns and melee Goals/Leadership: none MO/Alias: violent gangs )

Reavers (Origin: FOT Size/Organization: large highly organized Technology/Weapons: high tech and cybernetics Goals/Leadership: cult MO/Alias: cyber punks who worship technology)

Regulators, The (Origin: FO3 Size/Organization: small loose affiliation Technology/Weapons: guns Goals/Leadership: $ MO/Alias: good guys )

Shi, The (Origin: FO2 Size/Organization: exlusive population Technology/Weapons: none Goals/Leadership: the Emperor MO/Alias: Japanese descended peasants )

Skags (Origin: FO2 Size/Organization: medium close knit Technology/Weapons: guns Goals/Leadership: survival MO/Alias: ghost farm mutants)

Slavers (Origin: FO2 and FO3 Size/Organization: large organized Technology/Weapons: guns Goals/Leadership: $ MO/Alias: evil businessmen who enslave the weak for fun and profit )

Talon Mercenary Company (Origin: FO3 Size/Organization: large highly organized Technology/Weapons: heavy weapons Goals/Leadership: $ MO/Alias: the meanest bad guys in the wasteland, no job too cruel or brutal )

Tribal Cult (Origin: FO3 DLC Size/Organization: small Technology/Weapons: none Goals/Leadership: cult MO/Alias: punga cult)

Tribals (Origin: All Size/Organization: vast scattered dissacociated Technology/Weapons: primitive Goals/Leadership: Chief MO/Alias: none)

Underworld (Origin: FO3 Size/Organization: exclusive population Technology/Weapons: none Goals/Leadership: survival MO/Alias: ghouls who are people too)

Vault City (Origin: FO2 Size/Organization: exclusive populationTechnology/Weapons: leftover vault technology Goals/Leadership: First Citizen MO/Alias: snobs in blue )

Vipers (Origin: FOVB Size/Organization: large tribe Technology/Weapons: primitiveGoals/Leadership: cult MO/Alias: worshippers of Hecate the Dark Mother and snake cult )

Water Merchants (Origin: FO2 Size/Organization: business Technology/Weapons: guns Goals/Leadership:$ MO/Alias: useful allies? )