An open roleplaying event, story, or thread means it's open to anyone. Also an open invitation to join a crafted series of events or roleplay usually on roleplaying forums. Some other events have auditioning or other requirements to participate.
Sometimes called "Open RP" or "Open-RP" (short for "Open RolePlaying").
- ^ RP'ing for Dummies (thanks to The WFR on Elftown)
- ^ Denotations in Posting roleplaying on the forums section of Tbelle's RP Guide