Discover how Niantic, creators of Pokémon GO, transitioned from NGINX to Envoy to handle millions of concurrent players worldwide. Learn about the challenges faced, the implementation of a service mesh, and the extension of Envoy to support proprietary protocols. Explore the scaling process using xDS, load testing strategies, and the final launch consolidation. Gain insights into Niantic's mission, their Real World Platform, and the reasons behind choosing Envoy. Delve into deployment overviews, production migration steps, and lessons learned from extending Envoy for Niantic's frontend.