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Half-Life: Opposing Force header art

Half-Life: Opposing Force

Return to the Black Mesa Research Facility as one of the military specialists assigned to eliminate Gordon Freeman. Experience an entirely new episode of single player action. Meet fierce alien opponents, and experiment with new weaponry. Named 'Game of the Year' by the Academy of Interactive Arts and Sciences.

Steam Page
Publisher
Release
November 1, 1999
26 years and 281 days ago
Steam Reviews
Overwhelmingly Positive28,737 reviews95.3%

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ContextThe evidence factors used to assess whether this game belongs on IndieGame.Fan.Status
Notes
Latest Contributor: IGF TeamEdit notes
Updated: Jul 13, 2026Developer scaleThe operating scale of the game's developer.
The developer operates under public or major corporate control.
Updated: Jul 13, 2026Publisher scaleThe operating scale of the game's publisher.
The publisher meets the large-publisher threshold through its catalog and developer network.
Search Google: Is Half-Life: Opposing Force self-published or published by Valve?Publisher statusHow the game's publishing relationship is classified.
Search Google: How is Half-Life: Opposing Force and Valve funded?FundingThe known source of funding behind the game.
Search Google: Who controls the creative direction and IP for Half-Life: Opposing Force and Gearbox Software?Creative controlWho appears to retain creative control of the game.
Updated: Jul 13, 2026Release statusWhether and how the game has been released.
The game was released through a separate publisher.

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About the Game

Return to the Black Mesa Research Facility as one of the military specialists assigned to eliminate Gordon Freeman. Experience an entirely new episode of single player action. Meet fierce alien opponents, and experiment with new weaponry. Named 'Game of the Year' by the Academy of Interactive Arts and Sciences.