Re:NandGame – Build a Computer from Scratch
by zertyslurty on Thursday December 03, 2020 @05:47AM
(#25287646)
You can create equivalents of AND, OR and NOT with only NAND, which is why it's possible for everything in a processor to be NAND gates only.
https://en.wikipedia.org/wiki/NAND_logic
It's kind of a learning-first game though so I guess if your goal is to beat the game and get every achievement, yeah you'll be disappointed.