Half-Life 2 Episode 1 Trailer (2006) - Half-Life 2: Episode One

As a standalone expansion released in 2006, this first-person shooter continues the story of Gordon Freeman immediately after the previous installment in City 17, requiring no ownership of the base game. You play alongside Alyx Vance, focusing on stabilizing a core to escape the collapsing city while evacuating citizens. Gameplay emphasizes physics-based combat and environmental puzzles, now featuring enhanced Source engine technology for improved facial animations and rendering. Community reception generally praises the tight focus and strong companion dynamic.