Achievement | How to unlock
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Battle-hardened (25 points) | Single player completed.
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Elite Unit (25 points) | Single player completed on Elite difficulty.
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Exterminator (20 points) | Killed 1000 aliens.
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Frag-master (30 points) | Killed 5 aliens with one Frag Grenade.
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Hidden Treasure (10 points) | Found all secret collectibles.
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Immobilised (20 points) | Stunned 5 aliens with one Stun Grenade.
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Meat Grinder (10 points) | Killed 250 aliens during multiplayer Survivor mode.
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More Speed, Less Haste (10 points) | 'Vengeance' completed in 17 minutes or less.
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Seasoned Squaddie (20 points) | Completed a level in multiplayer.
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Survivor (10 points) | Stayed alive for 8 minutes in Survivor mode.
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Tank (10 points) | Took 500 damage without dying.
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The Informed (10 points) | Picked up all the logs.
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