I didn't make it because I figured someone would've beaten me to it. My category requests is "All Cassettes", and all (or at least some) of the badges. I might do a run once I get comfortable with this game.

An all achievements run is something I was thinking about, and the problem with all cassettes is that I'm not sure how many cassettes there is in total in ANY game. If you could find the exact number of cassettes there is in any game, I'd add the All Cassettes category.

the problem with all cassettes is because the cassette on the first floor can be one of two cassettes: eddy or human music

That's not a problem, the real problem here is that there is some rooms that have no cassettes, adn knowing that the layout is always different sometimes a building can have less cassettes than others.

every room has a cassette. if you look hard enough you will find it

If every room has a cassette, then the cassette on first floor shouldn't be a problem.

Cassettes are randomized, because floors are randomized and sometimes gone. i don't think it would work out that well

And it also would be a pain to verify

yea it would be kind of rng based i guess