Half-Life: Opposing Force cover art

Half-Life: Opposing Force

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developerGearbox Software
publisherSierra Studios
Valve Corporation

release date
NANovember 1st, 1999
EUDecember 3rd, 1999
M for Mature

Single PlayerSci-FiFirst-PersonShootingAliensMilitaryPuzzle
SteamView Steam Store Page
addedby ShadowNewhouse
on April 5th, 2023 last updatedby blustrkr
on May 9th, 2025
 
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