I'm talking about the first Resident Evil. All the backtracking, getting specific items to continue. Would this be considered a metroidvania style game, or is it something else
It's a Zelda
I've always thought that this was a hallmark of Nintendo design that they just did really well... better than most, actually. That layered approach of new skills/items allowing you to access more parts of the world; those areas you see throughout your journey, leave an imprint on your brain, which you recall later when you get said item/skill. I've always associated it the most with the Zelda games.
This is my take. Literal locked doors do not a Metroidvania make.Metroidvania's typically refer to increased abilities to access new areas. Resident Evil has more in common with point and click adventure game puzzle design.