Half-Life: Opposing Force

a.k.a. HL:OpFor

published by Valve in 2013-06-31, developed by Gearbox Software / Valve, running on Linux
type: action/reflex, shooter
genre: Science Fiction, Environmental puzzle, First-person shooter
series: Half-Life
perspective: 1st person
player options: single player, LAN, Internet
languages: eng

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