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first-person shooter

Half-Life: Opposing Force

By Gearbox Software, released 1 Jan 1999

  • Linux
  • Microsoft Windows
  • macOS
  • science fiction video game

What it is

Half-Life: Opposing Force is a 1999 action game developed by Gearbox Software and published by Valve. It returns to the Black Mesa Research Facility from the perspective of a military specialist assigned to eliminate Gordon Freeman. The game offers a new single-player episode with alien opponents and new weaponry. Steam also lists multiplayer, adjustable difficulty, custom volume controls, save-anytime support, Family Sharing and play without timed input. Valve Anti-Cheat is enabled. The Steam genre is Action, and the game is available on Windows, macOS and Linux. Its listed release date is November 1, 1999. The story shifts the viewpoint to a member of the military presence at Black Mesa, while the feature list includes both single-player and multiplayer modes.

What players like, and what they don't

  • New single-player episode at Black Mesa
  • Includes multiplayer
  • Adjustable difficulty and save-anytime support
  • Available on Windows, macOS and Linux
  • No price is provided
  • No specific multiplayer modes are listed

Who it suits

It suits players interested in a Black Mesa story from a military specialist’s perspective, with both single-player and multiplayer listed. It is available on Windows, macOS and Linux.

Opposing Force offers another Black Mesa perspective alongside a feature list that includes single-player and multiplayer. It also supports adjustable difficulty and saving at any time.

More from Gearbox Software

Every Gearbox Software game