* ActorAllusion: This isn't Tony Jay's [[WesternAnimation/SecretSquirrel first time]] voicing a BigGood who happens to be the leader of an organization that deals with espionage and is known only [[EverybodyCallsHimBarkeep by his occupation]].
* DevelopmentHell: The film adaptation. Cult director Creator/RogerAvary was tapped to write and direct, then was sent to jail for vehicular manslaughter. When he got out, the funding had dried up. Supposedly he's still attached, but few people really want to fund a video game movie in the age of comic book movies.
* DuelingWorks:
** Part of the 2001-2002-2003 UsefulNotes/WorldWarII FirstPersonShooter blitz ({{pun}} intended) with ''VideoGame/Battlefield1942'', ''VideoGame/MedalOfHonorAlliedAssault'' and ''VideoGame/CallOfDuty1''.
** One might add ''VideoGame/IronStorm'', a FPS with a similarly outlandish ScienceFiction take on a World War set in Germany (though with neither Nazis nor undead nor cyborgs).
* HeyItsThatSound:
** The Grenade Launcher sound from ''VideoGame/QuakeII'' and ''VideoGame/QuakeIIIArena'' is reused once again, for the hand grenades.
** ''Enemy Territory'' reuses the sound assets from ''RTCW'', including the music.
** The zombies' growls and shrieks were previously used for the undead creatures in ''VideoGame/TheElderScrollsIIDaggerfall'', which in turn lifted the sounds from old Creator/HannaBarbera cartoons, most notably ''WesternAnimation/ScoobyDoo''.
** The benevolent wizard in the intro who seals away Heinrich grunts in pain exactly like the [[VideoGame/{{Doom}} Doomguy]].
* ManualMisprint: The game's manual claims that ''VideoGame/CastleWolfenstein'' was released for the Apple II in 1983 and was about infiltrating a Nazi headquarters to assassinate Adolf Hitler with a bomb. ''Castle Wolfenstein'' was released for that system in 1981, and the plot described was actually that of its sequel '''''Beyond''''' ''Castle Wolfenstein'' from 1984.
* MilestoneCelebration: ''RTCW'' was released twenty years after ''VideoGame/CastleWolfenstein'', the first game in the ''VideoGame/{{Wolfenstein}}'' series.
* PlayingAgainstType: Creator/TonyJay, known for playing sinister villains, does the voice of the [[BigGood OSA Director]].
* SequelGap: The gap from ''Spear of Destiny'' in 1992 to this game in 2001 is the longest in the series at 9 years between games, followed by another gap to the 2009 ''VideoGame/{{Wolfenstein|2009}}'', though how long exactly depends on whether you only count ''[=RtCW=]'', which leaves the gap at 8 years, or include Splash Damage's ''Enemy Territory'' addon, which shortens it to 6.
* WhatCouldHaveBeen: Originally, ''Wolfenstein: Enemy Territory'' would have been a sequel to ''RTCW''. Only the multiplayer portion of the game was released, as a free downloadable game, with the single-player portion of the game being cut. This paved the way for the ''Enemy Territory'' series which continued with ''VideoGame/EnemyTerritoryQuakeWars''.
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