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We show you how to get through the Hush side quest and get the Serial Killer Achievement / Trophy
Keywords: Batman: Arkham City, Batman: Arkham City (Collector's Edition)
Tags: quest, killer, pc, trophy, arkham, 360, guide-achievementtrophy, batman-arkham-city, achievement, wiki, 3, guide, gameplay, playstation, games, city, side, serial, xbox, walkthrough, xbox-360, ps3, batman-arkham-city-collectors-edition, batman