Portal 2: Community Edition is a fan-driven initiative developed by a team of 29 developers to enhance the experience of creating and playing custom content within Portal 2. It introduces technical upgrades including physically based rendering, more detailed textures, improved lighting, clustered shading, dynamic shadows, specular highlights, and volumetric fog. The edition focuses on providing robust tools for custom content creation, currently offering single-player gameplay with plans for multiplayer support. It utilizes the Strata Source engine, a modified version of the CS:GO engine, which enhances performance and expands creative possibilities for modders. New modding tools include adhesive gel, a paint gun, Schrödinger cubes, and colored lasers, along with the 'AngelScript' scripting framework for unique game modes. Full Steam Workshop support is integrated, allowing players to share their creations. Portal 2: Community Edition is now available on Steam as a free download, requiring ownership of the original Portal 2.