Download | Steam

Steam was launched by Valve Corporation in September 2003, initially serving as a mandatory update client for games like Counter-Strike . Before this, gamers had to manually download and apply patches, often leading to fragmented player bases on different versions. By 2004, Valve required the Steam client to play Half-Life 2 , effectively forcing a shift from physical discs to a digital-first ownership model. How the Steam Download Works: Technical Architecture

When a user clicks "Install," the Steam client interacts with a sophisticated global infrastructure: Download Steam