Dead Space

1. 
   Welcome Aboard

   Complete Chapter 1 on any difficulty setting.
   66%
2. 
   Lab Rat

   Complete Chapter 2 on any difficulty setting.
   55%
3. 
   All Systems Go

   Complete Chapter 3 on any difficulty setting.
   48%
4. 
   Cannon Fodder

   Complete Chapter 4 on any difficulty setting.
   45%
5. 
   True Believer

   Complete Chapter 5 on any difficulty setting.
   42%
6. 
   Greenhouse Effect

   Complete Chapter 6 on any difficulty setting.
   39%
7. 
   S.O.S.

   Complete Chapter 7 on any difficulty setting.
   37%
8. 
   Strange Transmissions

   Complete Chapter 8 on any difficulty setting.
   35%
9. 
   Wreckage

   Complete Chapter 9 on any difficulty setting.
   35%
10. 
    Keeper of the Faith

    Complete Chapter 10 on any difficulty setting.
    34%
11. 
    Betrayed

    Complete Chapter 11 on any difficulty setting.
    33%
12. 
    Exodus

    Complete Chapter 12 on any difficulty setting.
    32%
13. 
    Final Regeneration

    Discover the Hunter's origins.
    22%
14. 
    Whole Again

    Pursue Nicole's investigation.
    25%
15. 
    Set A Benchmark

    Complete the game on Medium difficulty or above.
    27%
16. 
    Untouchable

    Complete the game in Impossible Mode.
    3.6%
17. 
    Trusted Contractor

    Complete New Game Plus on any difficulty mode.
    5.9%
18. 
    Full Arsenal

    Own every weapon in the game.
    34%
19. 
    Built To Order

    Install every weapon upgrade.
    7.0%
20. 
    Autofire

    Kill 30 enemies with the Pulse Rifle.
    40%
21. 
    Live with the Hot Ones

    Kill 30 enemies with the Flamethrower.
    33%
22. 
    A Cut Above

    Kill 30 enemies with the Ripper.
    26%
23. 
    Pusher

    Kill 30 enemies with the Force Gun.
    18%
24. 
    Eviscerator

    Kill 30 enemies with the Line Gun.
    14%
25. 
    Full Contact

    Kill 30 enemies with the Contact Beam.
    21%
26. 
    One Gun

    Beat the game using only the Plasma Cutter.
    4.4%
27. 
    Pack Rat

    Place 25 items in Storage.
    18%
28. 
    Story Teller

    Collect 75 Logs.
    41%
29. 
    Legend Teller

    Collect 150 Logs.
    32%
30. 
    Merchant

    Collect all Schematics.
    6.2%
31. 
    Marksman

    Dismember 50 Limbs.
    74%
32. 
    Surgeon

    Dismember 500 Limbs.
    40%
33. 
    Wishbone

    Rip off a dangling limb using Kinesis.
    9.6%
34. 
    Raise The Stakes

    Pin an enemy.
    44%
35. 
    Freeze

    Use Stasis on 50 enemies.
    39%
36. 
    Backbreaker

    Kill 10 enemies with a stomp attack.
    14%
37. 
    Maxed Out

    Fully upgrade all weapons and equipment.
    4.4%
38. 
    Front Toward EnemySecret

    Steam withholds the description of a secret achievement.
    28%
39. 
    Z-BallerSecret

    Steam withholds the description of a secret achievement.
    22%
40. 
    There's Always Peng!Secret

    Steam withholds the description of a secret achievement.
    31%
41. 
    Full ClearanceSecret

    Steam withholds the description of a secret achievement.
    22%
42. 
    Brute ForceSecret

    Steam withholds the description of a secret achievement.
    47%
43. 
    ExterminatorSecret

    Steam withholds the description of a secret achievement.
    39%
44. 
    Get Off My Ship!Secret

    Steam withholds the description of a secret achievement.
    35%
45. 
    Mindless PreySecret

    Steam withholds the description of a secret achievement.
    32%
46. 
    MarkedSecret

    Steam withholds the description of a secret achievement.
    14%
47. 
    ReunionSecret

    Steam withholds the description of a secret achievement.
    4.3%

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 47 of them.