There are a lot of systems available to roleplayers in the Castle. The best
one to start out with is freestyle, because it's probably what you were doing
anyway (you just didn't realise it!), and as your skill grows, you can progress
to the more complex numbers-based systems.
These pages aren't at all trying to be definitive resources for systems
roleplay- that's vastly beyond the scope of this site. What they offer is
a brief overview of the system so you can familiarise yourself with it, if,
say, you're involved in a roleplay with people who use the system- plus links
for further resources if you're really interested in learning it.
World of Darkness
- Hosted article by Dragon, giving an overview
of World of Darkness style and system basics.
Advanced Dungeons and Dragons