Mercury 2 is an open-source platform designed to help developers create and customize their own Roblox revival projects, particularly those focused on recreating older versions of the Roblox client, such as the 2013-era version. Originally launched as Mercury 1 and later revamped, Mercury 2 transitioned into Mercury Core, a streamlined web platform that simplifies backend development while allowing for advanced customization through coding. By providing a stable, customizable framework and offering essential tools for client and server management, Mercury 2 (now Mercury Core) aims to reduce development time and allow creators to build retro Roblox experiences with ease, making it accessible to both technical users and those with less programming experience.