Frac4D – a 4D Tetris variant from 1990
Made by Per Bergland and, funnily enough, Max Tegmark.
There’s also a slightly saner variant called Frac which is only 3D.
Also, anybody else find it a bit amazing that we can emulate DOS games in our frickin’ browsers‽
![](https://kbin.life/media/cache/resolve/entry_thumb/a5/3a/a53aa203802cdbe494021be90c667053f741e29f595285f88c01f2792ec84712.jpg)