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Instructions:
 Angry aliens are invading earth! Shoot the invaders while teaching them a thing or two about ECOLOGY! Your knowledge and shooting skills just might save the world!
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Category: Action, Adventure, Education, Shooting, Strategy Tags: abiotic, biology, bioman, biotic, carbon, commensalism, community, cycle, ecology, ecosystem, Education, en, Learning, mutualism, nitrogen, organism, parasitism, population, succession, symbiosis, water
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