The unofficial site of Basic Roleplaying, the Chaosium d100 System. Hosting a variety of resources for use with Basic Roleplaying: including The Chaos Project, user contributed lists of items, abilities and NPCs. Uncounted Worlds, a fanzine for Basic Roleplaying. Scenarios and Adventures, Rules Conversions and Variants for Basic Roleplaying game systems and milieus. World Forges; collaborative game worlds. BRP Wiki for collaborative works, information and encyclopedia for Basic Roleplaying.

RPG campaign design and world building for RuneQuest, Basic Roleplaying and d20 Dungeons and Dragons, GURPS and FUDGE. A collaborative campaign world with maps and general descriptions of the world as well as easily usable locales. World building resources for creating intriguing, compelling game world backgrounds cover religion, magic and cultures in fantasy roleplaying games with mapping, methods, techniques and tools. Online editions of the d20, RuneQuest and FUDGE system reference documents.