Half-Life Opposing Force PC CD-ROM Big Box Expansion Pack Sierra 1999 Complete For Sale

Experience an entirely new episode in the Half-Life universe with Opposing Force for PC. Developed by Gearbox Software and published by Sierra, this expansion pack puts you in the boots of Adrian Shephard, a U.S. Marine assigned to the Black Mesa Research Facility. Relive the critically acclaimed 3D action gameplay of the original Half-Life, now with new weapons, characters, aliens, and extensive multiplayer content. This listing includes the original big box, CD-ROM in jewel case, manual, and various inserts. The game is rated Mature 17+ by the ESRB. A must-have for fans of the Half-Life series and classic PC gaming.

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