Yes, I'm aware of the tag. But it didn't tag some of the titles like
Spoiler (mouse over to view)
Umineko no Naku Koro ni
which has the element I mean. Versions of the same world. Like parallel universes in
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Mirai Nikki
. Or the changeable "loops" like Spoiler (mouse over to view)
Umineko
and Spoiler (mouse over to view)
Higurashi
. Or like the worlds in 11eyes. Character-1 dies in world 2 while character-3 takes their place. Someone creates a parallel world using their imagination in order to have a perfect life. This sort of thing. I want more of it, please. I know it's vague. ^__^ Bear with me, please, this is the best way I have of describing it.