Simon S. said: It entirely depends upon the Community. If someone with the ability and time is willing to create a character sheet, then the system gets a character sheet. Quite a few of these obscure games happen to have fans that had the ability to code and time to devote to it. There are other factors involved, as well. I created the Unknown Ponies sheet because I'm running an UP campaign and my players asked for it; once it's created, why not share it? I doubt many if any people use it, but it's no skin off my back to submit the sheet. Once the UP sheet was complete, creating the Unknown Armies sheet was close to trivial, as UP is based on UA.