10 achievements for 1000 Gamerscore
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Port Destroyer
Defeat S.S. Landshark.
100 Gamerscore
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Jungle Explorer
Defeat Tremor.
100 Gamerscore
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Country Pioneer
Defeat Combine.
100 Gamerscore
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Desert Conqueror
Defeat Sphinx
100 Gamerscore
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Arctic Obliterator
Defeat Rigger.
100 Gamerscore
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Alien Bane
Defeat Goo.F.O.
100 Gamerscore
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Competitor
Post your High Score on the Leaderboards.
100 Gamerscore
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Dinopocalypse
Defeat 100 enemies.
100 Gamerscore
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Just ROARR!
Defeat 1000 enemies.
100 Gamerscore
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Collector
Unlock all non-boss entries in Rexopedia.
100 Gamerscore