A multimedia franchise spawned from the 2006 ''Anime/CodeGeass'' anime series. Created by Creator/{{Sunrise}}, the story is set in an AlternateHistory where Britain ''won'' the Revolutionary War, but lost a later war against Napoleon, who went on to conquer the British Isles. This nation evolved into Britannia, a SocialDarwinist empire that controls over a third of the world. The story details exiled Britannian prince Lelouch's attempts to bring down the tyrannical empire using a supernatural power known as "Geass".

''Code Geass'' produced an incredible amount of AllThereInTheManual content, which includes RadioDrama-like Sound Episodes, {{Picture Drama}}s and DVD-exclusive short stories that help flesh out the show's universe or expand on its characters. It also garnered five AlternateContinuity manga and multiple games to date.

!Works in this franchise:
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* ''Anime/CodeGeass'' -- The original anime, spanning two 25 episode seasons.
* ''Anime/CodeGeassAkitoTheExiled'' -- A sidestory {{OVA}} directed by [[Manga/TheVisionOfEscaflowne Kazuki Akane]], whose first episode premiered in Japanese theaters on August 4th, 2012. It takes place between the first and second seasons, focusing on a group of Japanese pilots fighting on the European front.
* ''[[CodeGeassNunnallyInWonderland Code Geass: Nunnally in Wonderland]]'' -- A 30 minute StorybookEpisode {{OVA}} that features the characters as the cast of ''Literature/AliceInWonderland''. Also acts as a BizarroEpisode of sorts for the entire series because of all the silliness going around being rather contrast to the darker atmosphere that is generally prevalent in ''both seasons''.

* ''Manga/CodeGeassLelouchOfTheRebellion'' -- The most faithful adaptation of the anime, even though it removes the HumongousMecha and most of the military action in favor of more comedy and {{shojo}} elements.
* ''Manga/SuzakuOfTheCounterattack'' -- Skews more {{Shonen}} and focuses on Suzaku rather than Lelouch; it turns the Lancelot into a powersuit and Suzaku into a Franchise/KamenRider-esque superhero.
* ''Manga/CodeGeassNightmareOfNunnally'' -- A vast departure from the normal ''Code Geass''; it focuses on Lelouch's IllGirl sister Nunnally, who becomes a LittleMissBadass in an ''[[Anime/NeonGenesisEvangelion Evangelion]]''-esque mecha and battles similarly-powered girls. (Oh, and Lelouch returns later on to channel [[Anime/MobileFighterGGundam Master Asia]].)
* ''Manga/CodeGeassTalesOfAnAlternateShogunate''/''Strange Tales of the Bakamatsu'' -- A UniversalAdaptorCast story that places the characters in the Bakamatsu era of Japanese history; Lelouch becomes the head of UsefulNotes/TheShinsengumi while secretly opposing the Meiji reforms brought on by Britannia (here standing in for Admiral Perry). More light-hearted than other adaptations/spin-offs, with a semi-[[SuperDeformed chibified]] art style and less melodramatic story elements (Zero and Black Knights, here renamed the Black Restoration Order, basically turn into RobinHood and his Merry Men). Also plays faster and looser with realism; a pizza delivery service exists, even though the manga takes place at a time well before pizza became popularized in America, let alone the rest of the world.
* ''[[Manga/CodeGeassRenyaOfTheDark Code Geass: Renya of the Dark]]'' began, with script by Goro Taniguchi and art by Tomomasa Takuma. This manga follows the story of the eponymous Renya, who encounters C.C. and [[IdenticalStranger a man bearing an incredible]] [[{{Expy}} resemblance to Lelouch]] in Edo-period ([[AlternateHistory or at least its equivalent]]) Japan.
* ''Manga/CodeGeassOzTheReflection'' --- A SpinOff that takes place between the first and second seasons. Written by Shigeru Morita, it tells the story from the viewpoints of two different protagonists, Orpheus Zevon and his sister Oldrin Zevon.

!!Visual Novel
* ''VisualNovel/CodeGeassLostColors'' -- Spin off Visual Novel with the main character called Rai who has lost his memories and has ended up at Ashford Academy. Now Rai must decide how he goes about regaining his memories.