Worlds Numberless and Strange includes:
- Nearly 70 new recursions
- Expanded information on locations, plots, and NPCs of Ardeyn and Ruk
- Plenty of new artifacts, adventure hooks, and other intriguing details
- The Implausible Geographical Society, a new secret organization of explorers
- New creatures for game masters
- New character options for players, including foci like Inks Spells on Skin and Quells Undead
- Tips on incorporating your favorite fiction and game worlds into The Strange