10 achievements for 1000 Gamerscore
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Overwhelming Infection
You died.
50 Gamerscore
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Take Down the Horde
Cleared Onslaught Mode on any scenario and difficulty.
100 Gamerscore
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Easy Peasy
Cleared a Campaign Scenario on Easy Difficulty or Higher.
50 Gamerscore
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A Walk in the Park
Cleared a Campaign scenario on Normal Difficulty or Higher.
100 Gamerscore
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Brutal Biohazard
Cleared a Campaign scenario on Biohazard Difficulty or Higher.
100 Gamerscore
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The Nightmare Rages
Cleared a Campaign scenario on Nightmare Difficulty.
150 Gamerscore
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Aim for the Head!
Defeated a Zombie.
50 Gamerscore
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They're Hunting You...
Defeated a Reptile.
100 Gamerscore
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Enforcing the Apocalypse
Defeated an Enforcer.
150 Gamerscore
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Too Strong For You
Defeated a Brute
150 Gamerscore