* BannedInChina: ''World at War'' was banned in Japan for "gory violence against Japanese soldiers". It should be noted that the ban was quickly lifted.
* BeamMeUpScotty: ''Call of Duty'' games often use the quote "only the dead have seen the end of war," attributing it to Plato.
* HeyItsThatVoice:
** [[Series/{{TwentyFour}} Jack Bauer]] voices Roebuck and GaryOldman voices Reznov in ''World at War''.
** Oldman is joined by Ed Harris and [[Film/{{Friday}} Craig]] in ''Black Ops''.
** Creator/SteveBlum voices your commander in ''Call of Duty 1'', Giovanni Ribisi is a private, and Creator/JasonStatham is British SAS member too.
*** Steve returns as Tank Dempsey in World At War's NaziZombies levels.
** Brian Johnson, vocalist of Music/{{ACDC}} voices the British commander in ''Finest Hour''.
** In [=CoD2=]: Big Red One, Creator/MichaelCudlitz (Bull), Frank John Hughes (Guarnere), Richard Speight Jr (Muck), Ross McCall (Liebgott), Rick Gomez (Luz), and James Madio (Perconte) all had speaking roles. Who are they, you ask? They were in Series/BandOfBrothers.
** Sam Worthington ([[Film/{{Avatar}} Jake Sully]], [[Film/ClashOfTheTitans Perseus]]) voices Alex Mason in Black Ops.
** [=MW3=] was not the first time William Fichtner played a [[Film/BlackHawkDown Delta Force operator]].
** Tony Curran voices [=MacMillan=] (Baseplate) in Modern Warfare 3 and has been an [[Series/UltimateForce SAS Commando before]] and played Creator/VincentVanGogh on ''Series/DoctorWho''.
** As mentioned on [[NaziZombies Call Of The Dead]], the BigBad is [[NightOfTheLivingDead George Romero]]. And who fights him? Creator/DannyTrejo, Michael Rooker, Creator/RobertEnglund, and Creator/SarahMichelleGellar.
** Private Polonsky from "World At War" is voiced by Aaron Stanford ([[Film/{{X-Men}} Pyro]]).
* NamesTheSame: There are 3 important characters who shared the last name Petrenko in the series (Mikhail in ''[=COD1=]'', Yuri in ''UO''[[labelnote:*]]Has nothing to do with the Yuri from ''[=MW3=]'' either[[/labelnote]], and Dimitri). None of them are related to each other.
* StreisandEffect: ''World at War'' became one of the most popular Xbox 360 games in Japan for a time, even though it was officially banned due to [[LudicrousGibs what typically happens to the Japanese soldiers in-game]].