90
The Tetris manual had names for the blocks
(lemmy.world)
Vintage gaming community.
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This is fake. They do have names, but they are: L, J, Z, S, I, T, and O.
Y'know what, I've always called them LJZSITO, and I can find plenty of sources to support that, but I can't find an authoritative source for it. I feel like I'm about to go down a research rabbithole…