Contra is set in the distant future of the year 2633 A.D., when the evil Red Falcon Organization have set a base on the fictional Galuga archipelago near New Zealand in a plot to wipe out humanity. Two commandos, Bill Rizer and Lance Bean[9][8] of the Earth Marine Corp's Contra unit (an elite group of soldiers specializing in guerrilla warfare), are sent to the island to destroy the enemy forces and uncover the true nature of the alien entity controlling them.[9] The promotional materials for the US arcade version downplays the futuristic setting of the game, with the manual for the later NES and home computer versions changing the game's setting from the future to the present day and the location from Galuga to the Amazon Jungle.

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