If just using all the same pieces verbatim is a liability then "cobalt vault" would be at risk since after a quick playthrough I haven't run into anything but the original shapes.
Yeah, I can believe that. I imagine the Tetris Holdings Company (or whatever it’s called) is pretty litigious about its trademark.
The history of Tetris in general, especially as it relates to copyright law and the weird, insanely complicated licensing situation with Henk Rogers, The Tetris Company, the Russian goverment, and the creator Alexey Pajitnov is actually pretty fascinating as well.
I love how Fable "decided" to get around this issue by just renaming things - it's not Tetris - it's Cobalt Vault!
Why no sir, these aren't Fruit Loops - they're Sugar Toroids!