Shelldom

1. 
   The Beginning

   Enter The Tower For The First Time
   —
2. 
   The Orbfather

   Collect All Orbs
   —
3. 
   You Bought WHAT?!

   Buy All Items In One Run
   —
4. 
   Holy Shell

   Complete Stage 1
   —
5. 
   Shell Done

   Reach The Top
   —
6. 
   Shop? I Hardly Knew Her

   Finish The Game Without Buying Any Items
   —
7. 
   Snailrunner 2049

   Complete Stage 2
   —
8. 
   One, Two, Three

   Complete Stage 3
   —
9. 
   ZERO Survivors, Except You

   Complete Stage 4
   —
10. 
    World Record (Probably Not)

    Finish The Game Within One Hour
    —
11. 
    Fifteen Minutes of Fame

    Finish The Game Within Fifteen Minutes
    —
12. 
    Kaelwyn’s Wisdom… or Whatever

    Listen To All Keylwyn Dialouges
    —
13. 
    Shellock HolmesSecret

    Steam withholds the description of a secret achievement.
    —
14. 
    The Shellector

    Unlock All Achievements
    —
15. 
    500 Ways to Bounce

    500 Jumps
    —
16. 
    Movimiento Secreto

    Found The Secret Move
    —
17. 
    The Jumpocalypse

    5000 Jumps
    —
18. 
    Snail’s Gravity-Defying Act

    50000 Jumps
    —
19. 
    I'm rollin rollin rollinSecret

    Steam withholds the description of a secret achievement.
    —
20. 
    Snail’s Space Program

    Do 500,000 Jumps
    —
21. 
    You Still There?Secret

    Steam withholds the description of a secret achievement.
    —
22. 
    Snail Theft AutoSecret

    Steam withholds the description of a secret achievement.
    —
23. 
    You Shouldn’t Be Here

    Entering the Torture Room for the First Time
    —
24. 
    Ghost Runner

    Complete the Game with "Ghost" Skin
    —
25. 
    Darkness Consumes You

    Reach the Top with dark mode
    —
26. 
    Are You INSANE???

    Finish the game in Hard difficulty while dark mode is active
    —
27. 
    I'm Burning Inside!

    Finish the game in Hard difficulty
    —

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