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Half-Life: Opposing Force is an expansion for the first title in the cult FPS series from Valve. This DLC expands the universe of the original game and allows players to experience a different perspective by allowing them to step into the shoes of U.S. Marine Corporal Adrian Shephard. He is one of the soldiers in the task force that was sent to Black Mesa to contain the disaster that led to the invasion of the facility by alien forces. His mission soon spirals into a desperate struggle for survival.
Half-Life: Opposing Force features an intense single-player experience that features new scenarios, weapons, and enemies. The expansion offers a new opportunity to enjoy the legendary franchise through an epic side story.