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Half-Life: Opposing Force

Half-Life: Opposing Force

November 10, 1999

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HO

Known titles

Alternative title: hl.exe

Alternative title: HL: OP4

Alternative title: HL: OPFOR

Alternative title: OP4

Alternative title: OPFOR

Information

Status: On sale

Release date: November 10, 1999

Developer: Gearbox Software

Publisher: Sierra Entertainment, Valve

Platforms: PC

Genres: Platform Puzzle Shooter

Themes: Action Science fiction Thriller Warfare

Age rating: ESRB M, PEGI 16

Website: Official site ↗

Available at

Steam ↗

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Half-Life: Opposing Force — Videos