Half-Life: Opposing Force - PC

Half-Life: Opposing Force - PC [used]

Loose disk.

Half-Life: Opposing Force is the official game expansion for Half-Life, the thrilling PC CD-ROM named game of the year by more than 50 publications. In Opposing Force (a.k.a. Op For), players return to the Black Mesa Research Facility to experience an entirely new episode of single-player action. In addition, Op For contains a massive collection of new multiplayer content.