[cjsawyer]

There’s also Not Tetris https://stabyourself.net/nottetris2/

[personjerry]

Also related, Hatetris which always gives you the worst piece: https://qntm.org/files/hatetris/hatetris.html

[pcthrowaway]

I just went down a rabbit hole with this excellent blog post on using data structures, search algorithms, and maybe some machine learning to try to beat the previous world record of 66 lines: https://hallofdreams.org/posts/hatetris/

[taneq]

And, of course, Futilitris: https://tetris.wiki/Futilitris

[chromoblob]

Wow, that's really cool game. That feeling of mathematical difficulty when you're playing is very cool.