IIRC the one I played ca. 2006 was called Globalia. It was super nerdy shit where you had to structure your posts like official government statements, very “model UN” kind of thing.
Shoutout to my based younger self getting to play Cuba and immediately allying with Al-Qaeda and trying to get nukes (they kicked me out for this)
I had friends in high school who played a homebrew space opera game like this. I could never figure it out so I stuck to regular, character driven RPGs.