Half-Life 2 Episode One PC Valve 2006 Factory Sealed New First Print Retail Box Half-Life 2 Episode One for PC, developed by Valve and published in 2006. This factory-sealed retail box contains the first episodic expansion to the critically acclaimed Half-Life 2, continuing the journey of Gordon Freeman and Alyx Vance. This standalone release includes the single-player campaign along with Half-Life 2: Deathmatch and Half-Life 1: Deathmatch: Source for online multiplayer action. The game is powered by the Source engine and features intense first-person shooter gameplay with advanced physics and storytelling. A must-have for collectors and fans of the iconic Valve franchise.