Creating new campaign - unable to select ruleset (ruleset missing from list of available rulesets

I am starting a new campaign and I am using the Castles & Crusades ruleset. Is it possible to have this ruleset added to the list of available rulesets in the 'Playing' field, as seen below?

If the game system you are using isn't on the list, just choose "other games." Having the system in the title and/or the description should still allow prospective players to find it.

Thank you Sarah!

Glad to help, Rom. If you run into any other issues, just let us know.

Wait, Rom, don't just choose "Other Games" for Castles & Crusades. C&C is one of the games commonly considered part of the OSR / Old School Revival / Old School Renaissance. There is a category for OSR in the drop-down menu. Use that for this. You can tag multiple games, so you can put Old School Revival & Other Games. You could also put D&D (Basic) on there if you consider C&C to be a clone of D&D. Whatever you choose from the drop-down, just write "playing Castles & Crusades game system" in the description text, and even the graphic logo if you like.