One of the variants in Tetris: The Grand Master, I expect.
I thought it strange when I saw “Ecstasy of Order” and they didn’t really address why NES Tetris should be emphasized over TGM and its successors, which appear to be explicitly designed to be the ultimate challenge. I suppose NES Tetris poses specific challenges within its own limitations. And it’s also a lot easier to obtain and haul around than a hulking arcade cabinet - except TGM did have a port on the XBox 360.
