Finally - I found a source that has the game I'm talking about! (the forum I used to play it in got shut down).
Basically you do this:
^ say something to/about or respond to the above poster
> say or add something about yourself
v say or predict something about/to the next poster
Content rules for posts still follow the rules of Discuss.moe.
(sorry if I'm not that great at explaining - I haven't played this one in forever so I'm really rusty.)
Since I'm first, again, I'll omit the "above poster" part.
> wants to relive the A5OG days
v is going to ask about it