In the year 2017, Genetically Unidentified Humanoid Extra Terestrial Soldiers land in Chicago City, USA to threaten Earth. As a member of the Sentinel Angels it is your job to save the world. There are 4 missions you must complete to save the world. Using the most powerful automatic-loading gun ever seen, you will fight battles on highways, sky-scrapers, trains and even at petrol stations. Anywhere the aliens appear you must be prepared to fight them.
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