Now here’s a fun find. Someone’s scanned the NBA Jam TE “save initialization” sheet. The game infamously shipped with a bug that broke saving games, but someone found a workaround before it shipped so every copy of the first run came with this leaflet telling you what to do.
According to a dev who worked on it, no one had actually tested save games in a “from scratch” state at the end of development, so no one knew there was a bug until the first run of carts was done. https://www.gamedeveloper.com/design/more-dirty-coding-tricks-from-game-developers