Backpack Boy

1. 
   A Flashlight?Secret

   Steam withholds the description of a secret achievement.
   94%
2. 
   A Tape Machine?Secret

   Steam withholds the description of a secret achievement.
   46%
3. 
   Escaped!Secret

   Steam withholds the description of a secret achievement.
   58%
4. 
   The View From Halfway DownSecret

   Steam withholds the description of a secret achievement.
   37%
5. 
   Safe InsideSecret

   Steam withholds the description of a secret achievement.
   52%
6. 
   A Remote?Secret

   Steam withholds the description of a secret achievement.
   50%
7. 
   Input AcceptedSecret

   Steam withholds the description of a secret achievement.
   38%
8. 
   Poison ReleasedSecret

   Steam withholds the description of a secret achievement.
   41%
9. 
   Free From The LabSecret

   Steam withholds the description of a secret achievement.
   39%
10. 
    The TowerSecret

    Steam withholds the description of a secret achievement.
    38%
11. 
    The End...Secret

    Steam withholds the description of a secret achievement.
    35%
12. 
    A 2nd ChanceSecret

    Steam withholds the description of a secret achievement.
    33%
13. 
    Poison Released AgainSecret

    Steam withholds the description of a secret achievement.
    30%
14. 
    The EndSecret

    Steam withholds the description of a secret achievement.
    30%
15. 
    100%

    Completed The Game Without Skips
    24%
16. 
    Deathless

    Complete The Game WIthout Dying
    2.2%
17. 
    Speedrunner

    Complete The Game In Under 1 Hour
    3.1%
18. 
    Find The Loopback RoomSecret

    Steam withholds the description of a secret achievement.
    52%
19. 
    End the loop without having loopedSecret

    Steam withholds the description of a secret achievement.
    9.7%

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 19 of them.