release timing: no
biased: yes, obviously, that's the whole point of these listing, to reflect a redaction's point of view, but that's not my point.
What I did mean is, just because you rated the game the highest early in the decade doesn't mean that you had a lesser enjoyment the games that released later and you did rated lower. Or even that they are less representative of the decade.
For example my highest rated game this decade would have been Dark Souls when it released, yet I wouldn't call it my game of the decade.
So then it is because Galaxy 2 is old. It got worse because it's old while BotW isn't old yet.
I'm sorry, this whole thing doesn't make any sense to me.