U.N.I.D.A. Catalog of Alternate Worlds & Platforms

From the introduction: Hundreds of Parallel Earths and Alien Worlds 1800+ Astounding Worlds to Explore Since its creation in 1983 Fringeworthy has been a unique game of high adventure across Parallel Earths and Other Worlds. You will find 1800 Alternate Earths here as well as a huge number of adventure nuggets to develop. Remember, we just did the platforms from - 100 to +100 and the rest are yours to populate and explore.