Passage is an open worldbuilding platform and social network that connects virtual and physical experiences through creator-built games. It provides an ecosystem for immersive, interactive 3D web environments, and is built with Cosmos and leveraging cutting-edge technology like Unreal Engine 5, Passage is blockchain-agnostic and supports in-browser streaming, cross-world commerce for fungible tokens and NFTs, decentralized social functionality, and 3D communication infrastructure.