23. BrewDog
Game: Fallout: New Vegas
Reference: Legendary Scottish brewery BrewDog, and their "Tactical Nuclear Penguin" beer.
Where it's found: A sign inside Brewer's Beer Bootlegging advertises the "Strategic Nuclear Moose".
22. Joker Thugs
Interplay
Game: Fallout
Reference: Jack Nicholson's Joker.
Where it's found: One of the thug guards in Old Town will occasionally say "Have you ever danced with the devil in the pale moonlight?", one of the Jokers most famous repeated lines.
21. Serenity
Bethesda
Game: Fallout 3
Reference: Serenity, the feature film based on the sci-fi Firefly television series.
Where it's found: During a Galaxy News Radio quest, DJ Three Dog exclaims "You can't stop the signal!", a direct quote from Serenity.