Half-Life: Opposing Force is a landmark expansion pack for the iconic first-person shooter Half-Life. Released in 1999 and developed by Gearbox Software, it redefines the events of the Black Mesa incident by putting you in the boots of the enemy. Official Download and Legal Access
Modern Note: On Windows 10/11, you may need to run the game in compatibility mode (Windows XP SP3) or use a source port like Half-Life: 25th Anniversary Edition. Half-Life- Opposing Force PC Game Free Download Direct Link
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While you won’t find a legitimate Half-Life: Opposing Force PC game free download direct link (outside of rare Steam giveaways), the asking price is a steal for one of the greatest FPS expansions ever made. Half-Life: Opposing Force is a landmark expansion pack