* Lots of them to Harry Enfield's ''Loadsamoney'' sketch character.
-->'''LOADSAMONEY!'''\\
Money, money, money\\
'''DOSH!'''
** Exaggerated with the DLC character "Harold Lott", who ''[[{{Expy}} is]]'' that character.
* "Who do you think you are, bleedin' ''Franchise/ActionMan?''"
* "I know, [[Film/TheItalianJob1969 you're only supposed to blow the bloody doors off!]]"
* "[[Series/RedDwarf Smeg]][[WebAnimation/{{Eddsworld}} head]]!"
* The KF_Aperture map is an outright {{Crossover}} with ''VideoGame/{{Portal}}''.
* The trailer for the Summer Sideshow event has a Clot saying "[[WesternAnimation/TheSimpsons Knife goes in, guts come out]]", while a Crawler ([[BodyHorror who has been reskinned into two girls fused together]]) says "[[Film/TheShining Come play with us!]]"
** There's also references to ''Literature/{{IT}}'', mostly spoken by the Circus Bloat. The Circus Husk also has some very [[VideoGame/{{Portal}} GLaDOS]]-esque lines.
* Some of the Christmas Zed quote ''I Just Want My Hula Hoop'' and ''Grandma Got Run Over By A Reindeer''.
** The Gingerfast likes to quote the fairy tale of the Gingerbread Man, and the Snow Husk quotes ''Frosty the Snowman'' and ''The Christmas Song''.
* The achievement for killing the [[NinjaPirateZombieRobot Vampriarch]] in the 2010 Halloween Sideshow event is "Sparkling in the Literature/{{Twilight}}".
* The .44 Magnum is the same model as Film/DirtyHarry's weapon. Killing six specimens with one shot each without reloading unlocks the achievement "Feeling Lucky?"
* [[VideoGame/CounterStrike Equipping the knife makes you run faster.]]
* The achievement for killing one Clot for every bullet in a full Mark 23 magazine is named "[[VideoGame/MetalGear Spec Ops]]".
* The Patriarch references [[WebAnimation/WeeblAndBob Magical Trevor]]:
--> ''I'm back, and I've got some new tricks!''
* The end of the first game (where [[spoiler:the Specimens escape into Paris]]) and especially the setting of the sequel are very similar with the end of ''Film/TwentyEightWeeksLater''.