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* Perhaps the UrExample: Creator/{{Atari}}'s 1975 coin-op ''[[VideoGame/AntiAircraft Anti-Aircraft]]''. Cutting a particular trace on the motherboard would turn the airplanes into [=UFOs=].
* The UsefulNotes/ArcadeGame ''Astro Blaster'' had a Sector 8 which would appear in the AttractMode if that was left to run long enough, but can't actually be played because the game loops after Sector 7. This made [[http://donhodges.com/Astro_Blaster_Secret_Bonus_01.htm Secret Bonus Number 20]] impossible to obtain without hacking the game.
* ''Astrosmash'' for the Platform/{{Intellivision}} was programmed as a compilation of two asteroid-shooting games, ''Avalanche!'' and ''Meteor!''. Since ''Meteor!'' was a simple clone of ''VideoGame/{{Asteroids}}'', Creator/{{Mattel}}'s lawyers ordered it removed, but its code remained in ''Astrosmash'', and a rare glitch could cause ''Meteor!'' to load when resetting the game. ''Meteor!'' was later reprogrammed to be less ''Asteroids''-like and released as ''Space Hawk''.
* Numerous bits of cut content were found in ''VideoGame/{{Cuphead}}'', including half-finished bosses (that seem like they were originally going to be part of the King Dice BossBonanza) a few extra weapons, and a unique death screen for [[EpicFail dying in the tutorial]] (which is impossible in the current release without hacking.)
* The Japanese version of ''VideoGame/ElementalGearbolt'' includes an unlockable [[AudioAdaptation audio drama]] of a plot point referenced in the main story. It is still present on disk in the English version, but inaccessible. The localizer, Creator/WorkingDesigns, decided to summarize the story of the audio drama in the manual instead of reproducing it in English.
* ''VideoGame/MetalSlug'' has a number of dummied out content within each game, with ''Metal Slug 5'' being the most egregious. Ragey's site [[http://randomhoohaas.flyingomelette.com/MetalSlug-MissingInAction/MSAction-Main.htm Metal Slug: Missing In Action]] documents the vast amounts of lost content there is in the series.
* Recca has a hidden intro buried in the game's code. [[https://www.youtube.com/watch?v=BrQn-O_zFRc It's probably a safe bet that someone didn't like SEGA very much.]]
* The cutscenes in ''VideoGame/{{Thwaite}}'' were originally supposed to have characters walking around, like during the game. Graphics for walking characters at cutscene scale are still present in the tile sheet.
* ''Franchise/TouhouProject'':
** ''VideoGame/TouhouKoumakyouTheEmbodimentOfScarletDevil'' has cut character stats and the barebones workings of what may have been a third playable character, known only by the few lines of code and an unclear but accepted name by the fandom: Rin Satsuki.
** ''VideoGame/TouhouKishinjouDoubleDealingCharacter'' has some unused swimming sprites for stage 1 boss Wakasagihime.
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