As far as using a game in Roll20, it doesn't need to be a 20-sided-die system... there's a whole lot of things out there that could be used here. Dozens and dozens of games. However , that scope is so large that it really doesn't have a place on our forums-- we only permit discussion that is specific to Roll20 (which you can read about in our Code of Conduct ). Since this is a general RPG question, you'd be better served posting it on a general RPG site, like reddit.com/r/rpg.
