EMPTY SHELL: PROLOGUE

1. 
   IT BEGINS

   Death count: 1
   —
2. 
   HERD

   Kills count: 15
   —
3. 
   LEAD

   Rounds fired: 100
   —
4. 
   DROP LIKE FLIES

   Death count: 10
   —
5. 
   JUST THE BEGINNINGSecret

   Steam withholds the description of a secret achievement.
   —
6. 
   DAD, YOU WERE RIGHT

   As big as an elephant
   —
7. 
   SWARM

   Kills count: 50
   —
8. 
   MORE LEAD

   Rounds fired: 200
   —
9. 
   TO BE CONTINUEDSecret

   Steam withholds the description of a secret achievement.
   —
10. 
    TECHNODEATH

    Deploy a Gadget
    —
11. 
    BLACK FRIDAY

    Upgrades Cost: >1000
    —
12. 
    ENGINEERING

    Use a Device
    —
13. 
    DOWN THE RABBIT HOLE

    Find 5 documents
    —
14. 
    WAKING UP

    Complete the Prologue at Nightmare difficulty
    —
15. 
    THE HARD KIND

    Complete the Prologue at Hard difficulty or higher
    —
16. 
    I HAD BETTER DAYS

    Complete the Prologue at Medium difficulty or higher
    —
17. 
    THE EASY WAY

    Complete the Prologue at Easy difficulty or higher
    —
18. 
    QUICK NIGHTMARE HANDSHAKESecret

    Steam withholds the description of a secret achievement.
    —
19. 
    A CLEAN SWEEP

    Kill 400 Walking Soulless
    —
20. 
    ARACHNOPHOBIA

    Kill 10 Spitting Spiders
    —
21. 
    TAP TAP TAP

    Kill 350 Small Spiders
    —
22. 
    RESEARCHER

    Collect all the documents in the Prologue
    —
23. 
    MADE OF STEEL

    Finish a level without taking any damaged on NIGHTMARE difficulty
    —
24. 
    BUTCHER

    Kill 350 enemies with the Old Axe
    —
25. 
    I DON'T LIKE SHOOTING

    Finish a level with only melee weapons
    —
26. 
    LONE SURVIVOR

    Survive the whole Prologue on NIGHTMARE difficulty with the same volunteer
    —

Names, descriptions and icons are the game’s own, as Steam publishes them.