Alien: Isolation

1. 
   Awake

   Complete the first mission
   89%
2. 
   Welcome to Sevastopol

   Complete the second mission
   69%
3. 
   A Hunt Begins

   Complete the third mission
   52%
4. 
   You Shouldn't Be There.

   Complete the fourth mission
   42%
5. 
   How Do You Feel?

   Complete the fifth mission
   34%
6. 
   Caught in the Trap

   Complete the sixth mission
   29%
7. 
   An Outpost of Progress

   Complete the seventh mission
   28%
8. 
   Shock to the System

   Use the stun baton
   29%
9. 
   Bait

   Complete the tenth mission
   24%
10. 
    Hazard Containment

    Complete the eleventh mission
    23%
11. 
    A Synthetic Solution

    Complete the twelfth mission
    23%
12. 
    Consultation

    Complete the thirteenth mission
    22%
13. 
    Survivor

    Complete the game on the hardest difficulty setting
    8.0%
14. 
    Ripley, Signing Off

    Complete the game on any difficulty setting
    20%
15. 
    The Missing

    Collect an ID tag
    72%
16. 
    The Taken

    Collect all ID tags
    2.1%
17. 
    Archivist

    Collect 10 Nostromo logs in the main campaign
    2.4%
18. 
    Light 'em Up

    Use the flamethrower
    32%
19. 
    Just out of Reach

    Contact your team and escape Comms without being attacked by an android
    7.3%
20. 
    Use With Caution…

    Use the shotgun
    24%
21. 
    Every Bullet Counts

    Use the revolver
    50%
22. 
    Self Defense

    Kill 10 humans
    24%
23. 
    Not a Scratch

    Escape from android combat without taking damage
    45%
24. 
    Retreat From Fire

    Cause the Alien to retreat using a molotov
    18%
25. 
    A Perfect Organism

    Encounter the Alien in Sevastopol for the first time
    58%
26. 
    She's in the Vents...

    Use the vent system 20 times
    49%
27. 
    I Admire its Purity

    Detect 30 targets with the motion tracker
    27%
28. 
    Back Off

    Cause the Alien to retreat by using the flamethrower
    30%
29. 
    Stunned

    Knock down a human or stun an android with a non-lethal attack
    29%
30. 
    Build to Survive

    Construct an item
    72%
31. 
    Mercy or Prudence?

    Complete the game without killing any humans
    2.9%
32. 
    Mind Your Step

    Navigate Reactor Maintenance without dying
    6.8%
33. 
    Seegson Security Bypass

    Perform 10 successful hacks
    28%
34. 
    Seegson Systems Expert

    Complete 10 minigames successfully
    21%
35. 
    Power Games

    Access 10 different rewire points
    35%
36. 
    A True Engineer

    Construct one of each craftable item
    19%
37. 
    A Record of Disaster

    Collect an archive log
    93%
38. 
    Voices of Sevastopol

    Collect 100 archive logs
    19%
39. 
    Fault Detected

    Kill an Android
    46%
40. 
    100 Times Too ManySecret

    Steam withholds the description of a secret achievement.
    3.9%
41. 
    Throwing the SwitchSecret

    Steam withholds the description of a secret achievement.
    22%
42. 
    The MessageSecret

    Steam withholds the description of a secret achievement.
    21%
43. 
    Hide. Run. Survive.Secret

    Steam withholds the description of a secret achievement.
    9.2%
44. 
    Not the FirstSecret

    Steam withholds the description of a secret achievement.
    27%
45. 
    TransmissionSecret

    Steam withholds the description of a secret achievement.
    21%
46. 
    One ShotSecret

    Steam withholds the description of a secret achievement.
    1.9%
47. 
    Free the Torrens

    Complete the seventeenth mission
    20%
48. 
    End of the Hunt

    Complete the eighteenth mission
    20%
49. 
    This Should Work

    Use the bolt gun
    22%
50. 
    My Turn Now

    Kill an android using only the maintenance jack
    11%

Names, descriptions and icons are the game’s own, as Steam publishes them; the share is how many owners have unlocked each, from Steam's global figures for 50 of them.