Features - Opposing Force Coop Mod for Half-Life: Opposing Force

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Opposing Force Coop

Half-Life: Opposing Force mod | Released Sep 30, 2007

"Half-Life: Opposing Force Coop" allows you to experience the epic Opposing Force story and environment with your friends, or with players around the world. Half-Life and Half-Life: Opposing Force on either WON or Steam is required to play. You must also either have an LAN or internet connection.

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