GTFO

1. 
   Bare Minimum

   Complete a Main Sector
   31%
2. 
   Indirect Course

   Complete a Secondary Sector
   3.0%
3. 
   Beyond Range

   Complete an Overload Sector
   1.6%
4. 
   Deviation

   Complete all Main Sectors in ALT://R1
   4.3%
5. 
   Infection

   Complete all Main Sectors in ALT://R2
   0.7%
6. 
   The Vessel

   Complete all Main Sectors in ALT://R3
   1.0%
7. 
   Contact

   Complete all Main Sectors in ALT://R4
   0.4%
8. 
   Rebirth

   Complete all Main Sectors in ALT://R5
   0.3%
9. 
   Destination

   Complete all Main Sectors in ALT://R6
   0.4%
10. 
    Rise

    Complete all Main Sectors in R7
    0.4%
11. 
    Duality

    Complete all Main Sectors in R8
    0.3%
12. 
    Additional Duty

    Complete all Secondary Sectors in all Rundowns
    0.2%
13. 
    Overload Operative

    Complete all Overload Sectors in all Rundowns
    0.2%
14. 
    Sum Total

    Complete all Sectors in all Rundowns
    0.2%
15. 
    Prisoner Deemed Fit

    Complete the Tutorial
    26%
16. 
    Invincible

    Complete an expedition without getting downed
    21%
17. 
    Chemically Improved

    Complete an expedition with at least one Booster activated
    16%
18. 
    Trigger Discipline

    Complete any A-tier expedition without using main or secondary weapons.
    0.4%
19. 
    Controlled Response

    Complete any B-tier expedition alone with only pistols or revolvers equipped as main and secondary
    0.3%
20. 
    Low Tech

    Complete any C-tier expedition without anyone using the active ability of their tools
    0.3%
21. 
    Close Quarters

    Complete any D-tier expedition with everyone using shotguns equipped as main and secondary
    0.3%
22. 
    Detox

    Complete any E-tier expedition without using any boosters
    0.6%
23. 
    Unbroken

    Survive a class V or higher alarm without anyone taking any damage
    4.9%
24. 
    Predator

    Kill a Scout with a melee attack without it detecting you
    9.2%
25. 
    Rapid Response

    Kill a Mother without it having used its spawning ability
    1.3%
26. 
    Swift

    Kill a P-mother without taking any damage from baby strikers
    0.6%
27. 
    Full Blooded

    Kill a Giant by yourself using only melee weapons
    1.8%
28. 
    Mutual Insurance

    Kill a Tank without anyone on the team taking any damage
    0.8%
29. 
    Guardian Angel

    Kill a Snatcher that has captured a teammate
    0.5%
30. 
    Breathing Room

    Complete any D-tier expedition without any doors being broken
    2.8%
31. 
    In the Shadows

    Complete any B-tier expedition without anyone having turned on the flashlight
    0.3%
32. 
    Matter Wave ProjectorSecret

    Steam withholds the description of a secret achievement.
    5.4%
33. 
    The InnerSecret

    Steam withholds the description of a secret achievement.
    0.2%
34. 
    Demolitions Expert

    Kill a total of 20 enemies with one tripmine
    1.4%
35. 
    Theorist

    Find 5 story logs in the Complex
    1.2%
36. 
    Versed

    Find 20 story logs in the Complex
    0.5%
37. 
    Cataloger

    Find 50 story logs in the Complex
    0.3%
38. 
    D-Lock Block Decipherer

    Find every story log in the Complex
    0.2%
39. 
    JohnSecret

    Steam withholds the description of a secret achievement.
    0.4%
40. 
    Work Together

    Complete an expedition with four player without anyone getting downed
    5.1%
41. 
    R4 Absolute

    Complete all Sectors in ALT://R4
    0.3%
42. 
    R5 Absolute

    Complete all Sectors in ALT://R5
    0.3%
43. 
    R6 Absolute

    Complete all Sectors in ALT://R6
    0.3%
44. 
    R7 Absolute

    Complete all Sectors in R7
    0.4%
45. 
    R8 Absolute

    Complete all Sectors in R8
    0.2%
46. 
    Main Path

    Complete all Main Sectors
    0.2%
47. 
    Pure Will

    Complete R8D1 without using any health kits or disinfectants
    0.2%
48. 
    Biotracker

    Complete any expedition having marked every enemy on the map using the Biotracker
    0.2%
49. 
    Prisoner Efficiency

    Achieve Prisoner Efficiency by completing the Main, Overload and Secondary Sectors of an expedition in one attempt
    1.2%
50. 
    Ultimate Efficiency

    Achieve Prisoner Efficiency in all expeditions that have Secondary and Overload Sectors
    0.2%
51. 
    The Voice of TruthSecret

    Steam withholds the description of a secret achievement.
    0.3%
52. 
    UnmaskedSecret

    Steam withholds the description of a secret achievement.
    0.2%
53. 
    LoyalistSecret

    Steam withholds the description of a secret achievement.
    0.4%
54. 
    DefectorSecret

    Steam withholds the description of a secret achievement.
    0.4%
55. 
    Meet SchaefferSecret

    Steam withholds the description of a secret achievement.
    0.4%
56. 
    Dots and DashesSecret

    Steam withholds the description of a secret achievement.
    4.1%
57. 
    Die Together

    Fail an expedition for the first time
    31%

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 57 of them.