An sc2replay file is a specialized game recording format generated by Blizzard Entertainment's popular real-time strategy game, StarCraft II. Unlike traditional video recordings that capture pixel data, an SC2 replay file records a chronological log of every single command, action, and decision made by all participating players throughout the match. This includes unit production, movement orders, resource collection, and hotkey usage. Because the file only stores these game events rather than audiovisual data, the resulting file size is remarkably small, typically just a few megabytes. When opened within StarCraft II, the game engine reads the command log and fully reconstructs the match in real-time, allowing viewers to watch the game from any player's perspective, analyze the map via an observer UI, and inspect detailed graphs and statistics related to economy, units lost, andapm actions per minute.