Marine Campaign Mission 2 - Aliens vs. Predator Guide - IGN

The level starts the marine off in the colony's mines. After you regain control of your marine, you should check around for secrets. You will be using

Marine Campaign Mission 3 - Aliens vs. Predator Guide - IGN

Marine Campaign Mission 1 - Aliens vs. Predator Guide - IGN

Marine Campaign Mission 1 - Aliens vs. Predator Guide - IGN

Marine Campaign Mission 3 - Aliens vs. Predator Guide - IGN

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Marine Campaign Mission 1 - Aliens vs. Predator Guide - IGN

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Marine Campaign Mission 2 - Aliens vs. Predator Guide - IGN

Marine Campaign Mission 3 - Aliens vs. Predator Guide - IGN

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Marine Campaign Mission 4 - Aliens vs. Predator Guide - IGN