Here is the full list of all 19 Camp W achievements.
You have earned every last achievement!
Best friends forever!
You've been there, done that, and then been there and done that again and again!
Unlock every memory for Ruby's page in your Grimoire
You've completed your Grimoire!
You've earned every badge available to a Camp W Camper.
Unlock every memory for Sid's page in your Grimoire
Unlock every memory for Blake, Miles, & Miller's page in your Grimoire
Unlock every memory for Ella & Ezzi's page in your Grimoire
Unlock every memory for Sophie's page in your Grimoire
You learned Norm's story and unlocked the secret ending!
Unlock every memory for Norm's page in your Grimoire
You've completed one playthrough of Camp W.
Unlock every memory for Wilfred's page in your Grimoire