GrimCo
Hero
At least 1-5 out of 100 casual gamers. But that's just my opinion. Or to give sports analogy. Football is big here. If you are able bodied male, you played it at least couple of times and know basics of the game. Handball is also decently popular and everybody played it at least couple of times in elementary school during PE. Indoor football and mini handball are generally played 5v5, so if you wanna play, you need to gather 9 other people. At work, with around 150 guys total, i can assemble group for weekly indoor football game in about 10 minutes, hell i can (and did) assemble 8 teams of 5 for mini tournament in less than an hour. On the other hand, i barley scraped together enough people for one mini handball game. Basketball would be somewhere in the middle. So, in TTRPGs, D&D is like a football. You can decently easy find players to form a group. CoC or PF would be something like a basketball. Mythender is handball.How many people have to play a game before it moves out of your "obscure" category?
To be clear, i do not impose value judgment on games based on popularity. But for group games, popularity among players is big factor.