Half-Life: Opposing Force
Native LinuxSingle-playerMultiplayer
Steam 95%Steam: the share of players who recommend the game on Steam. Metascore: the average critic score on Metacritic, from 0 to 100.
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.
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Prices in official storesOfficial stores sell the key on behalf of the publisher (Steam, GOG, Humble…). Keyshops are third-party key resellers (Kinguin, Eneba, Instant Gaming…): they cost less but aren't the publisher's store, and support and refunds go through them. Check the key's platform and region and prefer sellers with many reviews. On Linux what matters is that it's a Steam key: the game starts with Proton just like one bought on Steam.
1 stores · updated 12 Nov, 17:35 · lowest first
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Prices in euros, for Europe. Prices updated on 12 November 2026 at 17:35. Price data provided by IsThereAnyDeal. Some links are affiliate links: if you buy through them IncastroPC may earn a small commission, at no extra cost to you.