Half-Life: Opposing Force - "We Are Pulling Out" (CH3) - Submachine Gun

Half-Life: Opposing Force - "We Are Pulling Out" (CH3) - Otis

İ think scientist so angry

Half-Life: Opposing Force - "We Are Pulling Out" (CH3) - tram ride

Half-Life: Opposing Force - Welcome To Black Mesa (CH2) - Tram

Half-Life: Opposing Force - Welcome To Black Mesa (CH2) - Sewer

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Galvanized steel #1

Half-Life: Opposing Force - Welcome To Black Mesa (CH2) - Radio

Half-Life: Opposing Force - Welcome To Black Mesa (CH2) - Transit System Tunnel