12 achievements for 1000 Gamerscore
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First Steps
Completed World 1
30 Gamerscore
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Taking It To The Skies
Completed World 2
40 Gamerscore
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Unstoppable
Completed World 3
50 Gamerscore
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Making A Splash
Completed World 4
60 Gamerscore
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Bouncing Off
Completed World 5
70 Gamerscore
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Thinking With Portals
Completed World 6
90 Gamerscore
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Lost Peaks
Completed World 7
100 Gamerscore
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Special Delivery
Completed World 8
110 Gamerscore
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Frostbite
Completed World 9
120 Gamerscore
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Dessert
Completed World 10
130 Gamerscore
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Grand Slam
Completed all bonus levels
150 Gamerscore
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19th Hole
Found a hidden level in the credits section
50 Gamerscore