View full achievement list for Gotham Knights
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A Sophisticated Mallet

15 Gamerscore

Defeat Harley Quinn in a Showdown
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Icebreaker

15 Gamerscore
Previous
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Dressed to Impress

30 Gamerscore
More achievements
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To the Victor Go the Spoils

15 Gamerscore
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Bad Apples in Every Orchard

15 Gamerscore
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Shock Til They Drop

15 Gamerscore
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Showdown Sovereign

90 Gamerscore
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Whispered Words

15 Gamerscore
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History Major

15 Gamerscore
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Rock and a Hard Place

30 Gamerscore
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Not On My Watch

35 Gamerscore