Back هالف ليف 2: لوسانت كواست ARZ Half-Life 2: Lost Coast Azerbaijani Half-Life 2: Lost Coast Catalan Half-Life 2: Lost Coast Czech Half-Life 2: Lost Coast German Half-Life 2: Lost Coast English Half-Life 2: Lost Coast Spanish نیمهعمر ۲: ساحل گمشده Persian Half-Life 2: Lost Coast Finnish Half-Life 2: Lost Coast French
Half-Life 2: Lost Coast er et computerspil udviklet af Valve Software og distribueret i Valve Softwares Steam distribution. Det var en tech-demo for at præsentere den nye HDR-teknologi til det dengang kommende Half-Life 2: Episode One.