Here is the full list of all 29 The Story Goes On achievements.
Hack and slash 1000 enemies!
Unlock Foster
Unlock Sprout
The controls aren't that hard...
Find 25% of items!
Unlock Gambit
Unlock your first boss room!
Start a run!
Find 50% of items!
Find 75% of items!
Obtain a sword upgrade in a hidden cave
have you ever wen't fest?
$ Dolla Dolla Bill $
...even though you've died 20 times...
Barely make it...
I've accepted my savior
I'll tell YOU when I've had enough!
Whip 10 ghosts as Foster
Beat an entire floor as Gambit using only his special ability
Cleared either the Dark Forest or the Void without taking damage
Don't kill the Witch Boss when she turns into a snake
Spin the wildcard 40 times
Obtain the Forest Page
Obtain the Snow Page
Obtain the Desert Page
Obtain the Dark Forest Page
Obtain the Spooky Page
Obtain the Final Page
Find all items!