Want your ROM collection playable from any browser? RetroAssembly turns it into a retro arcade cabinet with box art, save states, and touch controls. Upload your own game files and the library detects box art and covers automatically, grouped by platform, with a Continue shelf that resumes your last session and a history view of recent games. More than two dozen systems run here, including NES, Super NES, Genesis, Game Boy, Game Boy Advance, arcade, Atari, PC Engine, and PlayStation 1. Save states can be created at any moment, synchronized, and resumed later, and some emulators can rewind gameplay after a mistake. Spatial navigation moves through games with a keyboard or gamepad, and an on-screen virtual controller makes touch devices playable without hardware. Retro-style shaders add visual effects. Each game page lists platform, release date, genres, developer, and publisher with screenshots and videos, and platform pages describe the console itself with its history and manufacturer. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. MIT licensed.