12 achievements for 1000 Gamerscore
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Jungle Explorer
Complete Level 1 (Jungle)
50 Gamerscore
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City Explorer
Complete Level 2 (New Whasington)
50 Gamerscore
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Death Tower Explorer
Complete Level 3 (Death Tower)
50 Gamerscore
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Earth Explorer
Complete Level 4 (Earth)
50 Gamerscore
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Rookie Agent
Complete the game on Easy
50 Gamerscore
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FBI agent
Complete the game on Normal
120 Gamerscore
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Expert agent
Complete the game on Expert
120 Gamerscore
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Don't look back
Without using Rewind on Easy/Normal
120 Gamerscore
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Never look back
Without using Rewind on Expert
170 Gamerscore
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Unfriendly Fire
Kill an enemy indirectly
50 Gamerscore
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License to Kill
Kill 50 enemies
50 Gamerscore
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Kill them All
Kill 200 enemies
120 Gamerscore