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  • Opposing Force is the first official expansion for Half-Life, developed by Gearbox Software under the supervision of the original creator Valve.
  • Half-Life: Opposing Force is an expansion pack for the first-person shooter game Half-Life. It was developed by Gearbox Software and published by Sierra On-Line...
  • Renowned for its engaging story and innovative gameplay, Half Life Opposing Force lets you experience the Half Life universe from a fresh perspective.
  • However, in the multiplayer game the player can carry both the new Opposing Force weapons and their Half-Life variants at the same time.
  • Half-Life: Opposing Force is a critically acclaimed expansion pack for Half-Life, developed by Gearbox Software and released by Valve Software on November 19, 1999.
  • Half-Life: Opposing Force is an expansion pack for Valve Software's science fiction first-person shooter video game Half-Life.
  • Warnings. The macOS (OS X) version of this game does not work on macOS Catalina (version 10.15) or later due to the removal of support for 32-bit-only apps.
  • In Half-Life: Opposing Force, Gearbox redefined what an action game expansion should be.