Canon in Resident Evil

Due to multiple Scenarios featuring alternative plots, one Scenario is rendered non-canon. Here, the Actual Canon is revealed.

Resident Evil
The actual canon scenario is Chris's. This explains Wesker's hate for Chris.
 * Chris saves Richard Aiken's life by getting Rebecca the serum.
 * Richard Aiken's official death would be being eaten by a Neptune.
 * Wesker kills Enrico Marini.
 * Chris first meets Lisa Trevor in the cabin and escapes.
 * Chris and Wesker fight against Lisa Trevor.
 * Rebecca gets lost, but manages to follow Chris eventually down to the laboratory.
 * Wesker shoots Rebecca and points the gun at Chris.
 * Wesker activates the Tyrant but is attacked and killed by it.
 * Rebecca reveals she was wearing bullet proof armor.
 * Rebecca would survive the first Tyrant T-002 confrontation and follow Chris who meets up with Jill.
 * As the goal is to get all of your allies aboard the helicopter, Jill and Rebecca survive along with Chris.
 * Barry somehow manages to survive the Mansion incident and returns to Racoon City.

Resident Evil 2
The "Claire B, Leon A" scenario is the canonical scenario in this game. As stated in the 'Death's Door' scenario, Ada Wong retrieved not actually a vial containing the G-Virus, but a G-Virus infected tissue fragment of William Birkin. According to Wesker's Report, Ada Wong's "death" is by falling, which happens in Claire B, Leon A, as in Claire A, Leon B Ada is killed by Mr.X by being slammed on a control panel, breaking her vertebrae, and is shown bleeding to death and the chances of surviving are too low without Wesker's same "infection" which she didn't have.

Resident Evil 3
The Canon is Jill killing the Nemesis, as well as Jill jumping off the bridge on the way to the Dead Factory. This will show the ending of Barry Burton saving Jill and Carlos from Raccoon City. Since Barry's survival is recorded in a file in Umbrella Chronicles, and Umbrella Chronicles is considered part of the main series as it reveals all of the secrets behind the Umbrella Corp. period of the series, this scenario of Jill jumping off the bridge can be considered canon. Whether Nicholai dies by being blown up in his helicopter or Jill negotiates with him to allow him to survive is up to the player since the file written by Nicholai in Survivor is not written in the Japanese localization.

Resident Evil 4
The entire main game is canon.

As "Separate Ways" is considered canon, then Ada killed an El Gigante just after the Cabin battle, and in the same place as the route where Leon gets attacked by an El Gigante, then the canon is taking the route through the Camp site way.

This also means that the Bella Sisters may have survived their confrontation with Ada as they fight Leon later on in the Camp site.

Ada fights against Saddler and wins, but Saddler attacks her from behind and captures her. Later, she is saved by Leon. Ada throws the special Rocket Launcher to Leon and he kills Saddler with no problem. Ada escaped with Saddler's Master Plaga sample, and Leon escaped with Ashley in the jet-ski, as Ada gave him the keys before making her escape in a helicopter.

Umbrella Chronicles
A possible way to make some of the chapters canon would be if they were actualy recreations made by Wesker, explaining his Narratives and the alterations' in the storylines. (ie. #3, Wesker could have known about Jill + Carlos going on a Train, Killing the Gulp Worm, Exploring the RPD and Killing the Nemesis. from survivors notes).

This also shows Chris as the canon character in Resident Evil, with Rebecca and Jill escaping. However, Barry is known to survive due to being mentioned in Resident Evil 2

Wesker -being underground- would not know whether Barry survived. Howether, although unseen, it is possible that between defeating Tyrant and the helicopter taking off, Barry could have made it to the helicopter and entered the Cockpit. This can be possible as the cockpit was not seen in the cutscene, only Jill, Chris and Rebecca.

Outbreak
Outbreak is very complicated when it comes to finding which character could make the scenario canon. However the canon is with the characters all (?) surviving. Sometimes it can be explained by how the ending is as a canon player's ending for a scenario is usually different from the other characters.

In some scenarios, there is a fourth Survivor. This 4th person is the canon character. However, they will either be killed off away from sight, or will stay at one place claiming to be "tired".

A minigame that came with File #2 showed zombiefied versions of all 8 main characters, who seem to appear in the places where they are known to have canonly been.

Outbreak File #1

 * Outbreak - Cindy, activating the bomb - explained by bomb craters' in End of the Road.
 * Below Freezing Point - Yoko, as main player.
 * The Hive - George, killing Leech Man - not present in Resident Evil Nemesis.
 * Hellfire - Mark.
 * Decisions, Decisions - George, as main player and escaping with Daylight - Has ties into the Storyline. Yoko as one of the AIPCs, survives - Also has ties with scenario (ie. greg).

Outbreak File #2

 * Wild Things - Cindy.
 * Underbelly - Jim - has ties to storyline, train ending includes extra info.
 * Flashback - Alyssa, discovering truth about Kurt's death, wanting revenge.
 * Desperate Times - Kevin - has ties into storyline.
 * End of the Road - David, saving Linda and making a bridge for her, killing the Nyx, and escaping in a jeep.

Gun Survivor 1
Ark and the Lotts escape from Sheena Island, which explodes.

Gun Survivor 2
The game is canon. Howether, the story is only set within a dream of Clairs.

Dead Aim
Bruce and Fong Ling survive and escape the ship together, and are saved.

Gaiden
The entire game is non-canon.