TheResident Evilseries is one of the most successful third-party franchises in the video game industry. It’s also one of the most notoriously complicated.

This can largely be chalked up to how it got off to an awkward start. The first twoResident Evilgames weren’t expected to be as popular as they were, and the third, 1999’sResident Evil 3: Nemesis,was made very quickly with an inexperienced team in order to fill a hole in that year’s production schedule.RE’s primary creator, Shinji Mikami, isn’t a huge fan of straightforward linear storytelling to begin with. He left Capcom in 2005, which was the same year as the untimely passing ofRE2writer Noboru Sugimura.

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Later creators at Capcom have tried to reorganize the series into a more coherent whole, with 2008’sResident Evil 5as a massive deck-clearing exercise that finally sorted out the storyline and wrapped much of it up for good. WhileResident Evilis still fond of complicated narratives (Lucasin the last third ofResident Evil 7,)the modern games are easy enough to follow.

For newcomers to the franchise, though, it can be tough to get intoResident Evil. Besides the conspiracy-laden craziness of the games' early installments, there are currently something like six otherResident Evilcontinuities. This includes Paul W.S. Anderson’s live-action film franchise (above), which stars Milla Jovovich as supersoldier Alice Abernathy, as well asthe planned 2021reboot of the film franchise, which deliberately skews closer to the games' storyline; and the upcoming Netflix live-action TV series, which stars Albert Wesker’s twin daughters Jade and Billie as they move to New Raccoon City.

Chris and Leon face off

The upcoming Netflix animated showInfinite Darknessis, like the previous OAVsDegeneration, Damnation,andVendetta,set firmly within the continuity of the mainstream gamesand co-starringResident Evil 2’s Leon Kennedy and Claire Redfield. While very little has been revealed aboutInfinite Darknesssince its debut last September, there are about to be enough mutually exclusiveResident Eviladaptations airing at once that it’s easy to imagine a newcomer to the franchise getting very confused, very quickly.

The World ofResident Evil

One of the remarkable things about the coreREsetting is that it’s a zombie story that isn’t set during or after an apocalypse. (Yet.) While there have been several massive disasters tied to various zombie outbreaks between 1998 and the present day, including the outright loss of several (fictional) cities, global civilization is still largely intactas of the series' present day.

This is mostly down to the existence of several organizations within and outside of world governments that are specifically out to keep the zombie count manageably low. The most famous of the lot is the BSAA, the Bio-Security Assessment Alliance, which was introduced in 2008’sResident Evil 5.A paramilitary group managed by the United Nations, the BSAA provides both logistic and military assistance in situations where it looks like a zombie plague, or “bio-terror,” might be a concern. It was co-founded byResident Evilmainstays Chris Redfield andthe conspicuous-in-her-absences Jill Valentine, and has been a major element of the series' lore in almost every game since its introduction.

Resident Evil 3 Zombies Original

The first animated movie, 2008’sDegeneration,mentions as a side note in its opening that there were a couple of dozen biological zombie attacks throughoutResident Evil’s Earthbetween 1998 and 2005, with a total death toll of around a million people. This includes the Raccoon City disaster, the setting ofResident Evil 2, 3,andOutbreak, and presumably would also retroactively count the sinking of the island city of Terragrigia, which forms a big part of the backstory of 2012’sResident Evil: Revelations.

Where Do Zombies Come From?

The primary cause of zombies in theREuniverse is the T-Virus. Its inconsistency within the games' universe has widely varying effects in every other continuity and has become the basis forseveral other weaponized plaguesover the course of the series.

The T-Virus’s official origin storyis that it’s a third-generation derivation from a virus found in a rare African flower. The scientists who originally discovered it quickly started the Umbrella Corporation as a cover for their research into its possible uses. By 1978, the flower had been refined into the modern T-Virus by Umbrella co-founder James Marcus, who promptly caught a bullet for his trouble. (Then heturned into an opera-singing leech monster).

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By 1998, the T-Virus’s primary use by Umbrella’s scientists was as a sort of biological super-glue. It could be used to produce entirely new forms of life, such as the series’s trademark Hunters, and Umbrella had just completed development on a planned “ultimate life form"code-named the Tyrant. Humans and animals who were exposed to the T-Virus would eventually die, and then reanimate into cannibalistic, hungry zombies.

The exact motivation for Umbrella’s T-Virus experimentation is less straightforward than it looks. One of the things that theResident Evilseries hasn’t communicated as effectively as it could’ve is that there were a lot of clashing agendas behind the scenes at Umbrella, which ranged from simple monomaniacal goal-seeking (Marcus) to a eugenics-fueled plan to forcibly evolve the human race into a subservient slave species (Umbrella CEO Ozwell Spencer).

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The Umbrella Corporation

Umbrella spent the better part of twenty years burning through unwilling research subjects to seewhat the T-Virus and its derivatives could do. This may also explain why theREuniverse is significantly ahead of the overall technological curve, as various games have shown Umbrella having access to tech like railguns, plasma cannons, semi-sapient artificial intelligence, and functional human cloning, all by the far-flung future year of 1998.

Despite all that, though, Umbrella couldn’t handle the PR hit from the Raccoon City disaster. In one of the most significant anticlimaxes in video game history, Umbrella was quietly driven out of businessbetweenRE3andRE4, as it lost several court battles offscreen and was forced to shut its doors.

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Several later antagonists have explicit ties to Umbrella, many of its projects ended up on the black market during and after Umbrella’s closure, and there have been occasional subplots in later games about someone planning a revival of some or all aspects of the company, but Umbrella itself is gonefor the time being. Several of its less monstrous employees were revealed inResident Evil 7’sNot a HeroDLC to have reincorporated as an anti-bioterror private military company under the questionable branding of Blue Umbrella.

This is another major point of departure betweenResident Eviland a lot of other media in its genre pool, including many of its adaptations. Umbrella actually lost the game. It isn’t an effectively permanent fixture of the game’s world, constantly springing back up from knockout blows like a corporate Jason Voorhees, or worse,staying on that Weyland-Yutani linewhere it constantly survives and even somehow benefits from its seeming defeats.

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Leon Kennedy

The return of the 21-year-old rookie Leon in 2019’sResident Evil 2remake served as a reminder to a lot of the gaming community that once upon a time, Leon didn’t suffer from alcoholism and PTSD. Since his sudden evolution from newbie copto backflipping super-agentin 2005’sResident Evil 4,Leon’s subsequent appearances have furthered his descent into a stoic, hard-drinking archetype, whose significant successes don’t matter as much to him as his relative handful of failures.

Following Leon’s walk into the sunset at the end ofRE2,Claire took off on her own to try and find Chris, leading into the events of 2000’sResident Evil: Code Veronica. That left Leon babysitting a 12-year-old Sherry Birkin when both of them were detained by the government. In order to keep an eye on Sherry, who was infected with a rare super-virus and heading into a bad time, Leon took the job the feds were offering. A training montage quickly ensued.

From there, he moved onto the Secret Service, where he accidentally ended up as the only dude bad enough to rescue the president’s daughter(Resident Evil 4), and the became the first operative in a new anti-bioterror department under President Adam Benford. As an agent in the Division of Security Operations, one of Leon’s first gigs was investigating the use of bioweaponry in an eastern European civil war (2012’sResident Evil: Damnation).

It probably didn’t help when shortly afterward, at the start of 2012’sResident Evil 6, Leon’s boss and friend President Benford was killed and zombified during the terror attack on Tall Oaks.

Naturally, by the time of his next canon appearance, in2017’sResident Evil: Vendetta,Leon is a bit of a mess.He’s still fully capable of John Wick levels of rapid target disposal, but he both enters and leavesVendettaas a strong portrait of insufficient coping skills. While Leon’s a badass, and has only gotten more so, he’s entering the events ofInfinite Darknessat what’s got to be close to the end of his rope.

Claire Redfield

Claire had to sit through a 15-year gap between 2000’sCode Veronicaand 2015’sRevelations 2,in which she only ever showed up in games likeOperation Raccoon Citythat were specifically retelling one of her previous appearances.No explanation’s ever been offered as to why.

Nonetheless, due to Claire’s rampageat the start ofCode Veronica,she still has the highest normal-human body count of any character in the core series, which may also explain why she later became a deliberate noncombatant. In 2008’sDegeneration,she’s established as working for a non-governmental organization called TerraSave, which provides aid and supplies for the victims of bioterrorism. While she can still hold up her end of a fight—she pulls off some hefty gun fu inDegeneration—she’s not specifically looking for one either.

By 2011, the year in which 2015’sResident Evil: Revelations 2is set, Claire is still at TerraSave, butgets abducted alongside several of her fellow employeesand taken to an uncharted island in the Black Sea for mad-scientist murder reasons. While Claire has a rough time of things, the game’s good ending sees her get out alive, mostly intact, and still apparently working for TerraSave.

InInfinite Darkness,all we know about Claire so far is thatshe’s sporting herRevelations 2look, and she’s teaming up with Leon again for the first time in the games' canon sinceDegeneration. If she keeps up with her personal traditions, she’ll end up weakly flirting with a new character who ends up dead, evil, or both by the end of the series, but maybe this is where Claire’s streak ends.