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| - These two series are spin-offs created as expansions upon the main series that provide insight into the universe without directly involving main series characters such as Chris Redfield; Jill Valentine; Leon S. Kennedy or Claire Redfield.
* The events of Resident Evil: Survivor are referenced in the opening monologue to Resident Evil Zero, where it is described by the narrator as the "second Raccoon City" in reference to its destruction at the end of the game.
* The boss enemy from Resident Evil Outbreak File 2, the Tyrant R, appears in the Resident Evil: The Umbrella Chronicles stage Death's Door. Also, Nikolai Zinoviev, the antagonist of Resident Evil 3: Nemesis makes a brief appearance in Resident Evil Outbreak. Daylight, the cure of T-virus in Outbreak was taken out of the city by one of the J's Bar survivors, it is mentioned in Resident Evil: The Marhawa Desire. Also, a newspaper article written by Alyssa Ashcroft appears in Resident Evil VII.
* Resident Evil Survivor 2 Code: Veronica's events have no relevance to the main series. It may be considered canon in the way that its events are merely a nightmare of Claire's from her experience on Rockfort Island, however files in the game are canon.
* Dino Stalker, the third title in the Gun Survivor series is not a part of the Resident Evil/Biohazard saga.
* Resident Evil: Dead Aim, the fourth title is mentioned in a Capcom book titled "INSIDE OF BIOHAZARD THE DARKSIDE CHRONICLES".
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