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