I need to ask something about the 2 sentences of the "main series alternating plot paths" that ı just tried to delete.
Alright so in both remake and umbrella chronicles it's impossible to make rebecca appear in the medical saveroom. It's only possible to do that in original. And since original isnt canon anymore and characters can have false flashbacks(as evidenced in umbrella chronicles and darkside chronicles) ı really dont think that sentence could fit there.
The other one is about william birkin and claire. First of all claire cant find a shotgun in streets or in rpd in re2. Second is after killing ben, birkin cant get under the hatch and fight claire since he is far behind already.(that would be really ridiculous since you would need to fight 2 boss at the same time.)
RE2 follows a similar format, because of the different scenario options it becomes convoluted, there isn't really a set canon in the second. And what happens in-game doesn't necessarily reflect what happened in the story, it's a classic example of gameplay vs story segregation. Darkside Chronicles' scenarios which feature Leon are told by him, so it's not too far fetched given how DC and Degeneration both show Leon and Claire together than in part of the game's story canon they were together in segments.
Guys ı just thought something but ı dont know if its possible or not in canon story. What if chris found richard alive after meeting with rebecca in medical save room and get serum to him, then carry him to the medical save room? I mean with jill, you can find richard alone and still alive so what if this is the case for chris? The flashback for biohazard the stage only tells that chris met with rebecca in medical saveroom for the first time. And like forerunner said, this could also be included in canon story as an unseen mix of various source. If this could be true for you, ı think we should delete the "implying Richard died before Chris arrived."