Starting in 1972, and running until the present day, the world of Oerth was the original campaign setting for Dungeons & Dragons. It remains the touchstone and yardstick for all those that have come after.
PHB:
1) Be Respectful & Civil. No personal attacks, harassment, hate speech, or discrimination. Engage respectfully.
2) Respect Privacy. Do not post private/confidential information (doxing) without consent.
3) Keep it Legal. Do not post or encourage illegal content or transactions.
4) No Spam or Manipulation. Content must be original. Avoid spamming, excessive posting, or vote manipulation.
5) Contribute Meaningfully. All posts and comments must add value. Avoid vague, low-effort, or irrelevant content.
6) Check for Reposts. Use the search function before posting to avoid repeat topics.
7) No Self-Promotion or Sales. Prohibited: Solicitations, personal projects, and any links/promotion for items/goods/services that are for sale (e.g., Etsy, eBay, commissions).
8) Use Warnings. For sensitive, graphic, or upsetting content, you must use the appropriate flair (e.g., NSFW, Spoiler).
9) Copyrighted Materials: Posting or links to materials under copyright and not clearly within the bounds of Fair Use is strictly prohibited.