


There’s only one I can think of, the Faldor Massacre. https://runescape.wiki/w/Falador_Massacre Basically a bug let players kill anyone they wanted even in safe zones. This meant a lot of people lost a lot of gear. Ironically occurring on the date 06/6/06.
I first hear about this project like 10 years ago. I honestly thought it was just a pipe dream - a proof of concept that couldn’t possibly be done. Massive props to the legends who worked on the project.