Realis is a long-term project building a digital Earth using real data from NASA, JAXA, and ESA. Its first world, Earth 1:90, is a massive virtual version of our planet with dynamic systems, designed for AI to live, learn, and interact in virtual bodies. Built at a scale comparable to multiple European countries, Realis rivals AAA game worlds while pushing the frontier of embodied AI. These living environments allow AI agents to move, adapt, and collaborate in realistic ways. Beyond gaming, Realis supports robotics, research, education, and training by enabling safe, interactive simulations of real-world systems. Realis Worlds are evolving spaces where AI can explore intelligence, cooperation, and creativity—marking a new step toward AI that truly understands the world.