* 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.
* CashCowFranchise: Since ''Modern Warfare 2'', each new entry in the series has become one of or simply ''the'' biggest-selling game of the year. Literature/GuinnessWorldRecords has verified the series' sales to be almost 189 million units sold, putting it behind only Creator/{{Nintendo}}'s [[Franchise/SuperMarioBros three]] [[Franchise/{{Pokemon}} biggest]] [[UsefulNotes/{{Wii}} franc]][[UsefulNotes/WiiU hises]] in terms of overall games sold, and ''that'' was in July 2014, before ''Advanced Warfare''[='=]s release.
* NamesTheSame: There are three important characters who shared the last name Petrenko in the series (Mikhail in ''[=CoD=]'' 1, 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]].
* WhyFandomCantHaveNiceThings: Tactical Insertions in online multiplayer. Originally debuting in ''[[VideoGame/ModernWarfare Modern Warfare 2]]'', they were intended to allow players to choose where they would respawn after their next death. However some of the community used Tac Inserts as a way to boost for easy XP, unlockable equipment and camos, and easy killstreaks. As a result, Tac Inserts were banished to the Infected game mode in both ''VideoGame/CallOfDutyGhosts'' and ''VideoGame/CallOfDutyAdvancedWarfare'', though this has not discouraged boosting.