Registering Sheet

Ok, I had this idea, because i am making a Roleplay forum but I want a registering form where you can put your own rules or information about your forum and like a Roleplay sheet. With characters name, history, personality apperance and other information you might like to use.

so you mean a character sheet??? they have one its located here
Admin Panel => Modules => Roleplay Game => Fields Management

To find out more about how to add fields and What it is
You can give https://help.forumotion.com/t3347-the-rpg-feature A look

Hello.

In addition to what 'Sir Mayo' said, you can also take a look at the custom profile fields option, so, when a user wanna register into your forum, he/she will have to fill that fields (if you put them as obligatory)

invisible_fa is right. You need to go Users & Groups--> Users--> Profiles. Simply choose the field type, fill the rest, and select Necessarily filled as Yes. Each registrant will fill out that form and it will appear on their Profile and/or Messages as determined by you.

To add rules you need to go to General--> Rules and FAQ --> Additional Rules. Type in those rules and click Save. Right above the text box and highlighted in blue letters are Show Rules. When you click that link, another tab will open to let you see the default rules [which are required and can not be removed] and your own rules below it.