| Achievement | How to unlock
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- A Hunt Begins (10 points)
| - Complete the third mission.
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- A Perfect Organism (10 points)
| - Encounter the Alien in Sevastopol for the first time.
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- A Record of Disaster (10 points)
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- A Synthetic Solution (10 points)
| - Complete the twelfth mission.
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- A True Engineer (20 points)
| - Construct one of each craftable item.
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- An Outpost of Progress (10 points)
| - Complete the seventh mission.
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| - Collect all Nostromo logs.
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| - Complete the first mission.
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| - Complete the tenth mission.
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- Build to Survive (5 points)
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- Caught in the Trap (10 points)
| - Complete the sixth mission.
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| - Complete the thirteenth mission.
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- End of the Hunt (10 points)
| - Complete the eighteenth mission.
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- Every Bullet Counts (10 points)
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- Fault Detected (20 points)
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- Free the Torrens (10 points)
| - Complete the seventeenth mission.
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- Hazard Containment (10 points)
| - Complete the eleventh mission.
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- Hide. Run. Survive. (40 points)
| - Complete the fifth mission without being killed by the Alien.
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- How Do You Feel? (10 points)
| - Complete the fifth mission.
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- I Admire its Purity (20 points)
| - Detect 30 targets with the motion tracker.
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- Just out of Reach (40 points)
| - Contact your team and escape Comms without being attacked by an android.
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- Mercy or Prudence? (50 points)
| - Complete the game without killing any humans.
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| - Kill an android using only the maintenance jack.
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- Not a Scratch (20 points)
| - Escape from android combat without taking damage.
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| - Complete the game without dying.
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| - Access 10 different rewire points.
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- Ripley, Signing Off (50 points)
| - Complete the game on any difficulty setting.
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- Seegson Security Bypass (10 points)
| - Perform 10 successful hacks.
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- Seegson Systems Expert (10 points)
| - Complete 10 minigames successfully.
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- She's in the Vents... (20 points)
| - Use the vent system 20 times.
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- Shock to the System (10 points)
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| - Complete the game on the hardest difficulty setting.
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| - Complete the fifteenth mission.
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- This Should Work (10 points)
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- Throwing the Switch (10 points)
| - Complete the fourteenth mission.
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| - Complete the sixteenth mission.
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- Use With Caution... (10 points)
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- Voices of Sevastopol (40 points)
| - Collect 100 archive logs.
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- Welcome to Sevastopol (10 points)
| - Complete the second mission.
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- You Shouldn't Be There. (10 points)
| - Complete the fourth mission.
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