Half-Life: Opposing Force is the official game expansion for Half-Life. 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 also contains a massive collection of new multiplayer content.
Minimum Specifications:
  • Pentium 233
  • 32 MB RAM
  • SVGA
  • Voodoo

    Recommended Specifications:

  • Pentium II 266
  • 32 MB RAM
  • SVGA 4MB
  • OpenGL

    Keyboard Layout

    Screenshot
    Other images