Half-Life 2: Lost Coast

Half-Life 2: Lost Coast is a short, single‑player showcase originally planned as part of the Highway 17 chapter. It demonstrates Valve's High Dynamic Range lighting and advanced graphics within the Source engine. The demo is available for free on PC, Linux, and Mac, offering a glimpse of the visual fidelity that would later define Half‑Life 2. Players navigate a coastal environment, encountering scripted combat and physics‑based puzzles while experiencing the dramatic lighting effects that set a new standard for game visuals. Though brief, Lost Coast remains a popular reference for graphics enthusiasts and fans of the Half‑Life series.