Bonus points for any non-D&D or D&D derivative systems.
My first RPG was Palladium Fantasy way back when my grognard uncle invited me to his groups table. I still don’t really grok it, but it was pretty formative of my ideas of what an RPG could be. The lack of balance and extreme existential threats as part of ordinary encounters included.
Needless to say, I haven’t found a group for this system in a looong while, eheh.
It’s hard to really understand what each roll means outside of combat. Like you can fail but have a great success at the same time. The passing of bonus to weaker members during a group check is pretty cool
It makes it a lot harder to dm imo. It helps if you keep the table of suggested consequences for advantage/triumph or threat/despair, but even that can’t always save you!