View full achievement list for Serious Sam: Siberian Mayhem
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David and Goliath

20 Gamerscore

Defeat Sentry Tower with sole hoverboard firepower
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Hole-in-One

15 Gamerscore
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Back To The Future

10 Gamerscore
More achievements
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David and Goliath

20 Gamerscore
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Breaking News

20 Gamerscore
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All Ingenious is Hard

30 Gamerscore
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The End

10 Gamerscore
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The Refinery

10 Gamerscore
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The Processing

10 Gamerscore
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Back To The Future

10 Gamerscore
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Combustion Tamer

30 Gamerscore