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- Half-Life: Opposing Force
- Half-Life: Opposing Force/Crush Depth
- Half-Life: Opposing Force/Friendly Fire
- Half-Life: Opposing Force/Missing in Action
- Half-Life: Opposing Force/Pit Worm's Lair
- Half-Life: Opposing Force/Plot summary
- Half-Life: Opposing Force/Table of Contents
- Half-Life: Opposing Force/We are Pulling Out
- Half-Life: Opposing Force/We are not Alone
- Half-Life: Opposing Force/Weapons
- Half-Life: Opposing Force/Welcome to Black Mesa