The Aaron said: Roll20 is agnostic to the game being played. Games with a larger following tend to have more community contributed support (character sheets, API scripts, etc), but at its heart, Roll20 is no different than sitting down to a table with friends for almost any sort of game. This, I've started coding a system for freaking SMT and it's pretty damn fun. The tools actually enhance the experience I would have compared to if I just tried to do everything by sitting down and writing. As long as you don't mind fiddling with macros and attributes you should have little issue testing out your system. And if you do, there's always the Forums ;)