Here is the full list of all 30 Sayonara Umihara Kawase achievements.
Fail a Stage 50 times.
View everything in the Illustration Gallery.
Clear all routes on Survival Challenge.
Clear all doors.
Play everything in the Sound Gallery.
Acquire 45 backpacks.
Use all characters.
Play your own Replay 10 times.
Unlock all Stages.
Watch all Stage Tutorials.
Watch the Stage Tutorial of a Stage you've cleared.
Clear Crab 2.
Clear Tadpole 2.
Clear Balloonfish.
Clear Crab.
Acquire 30 backpacks.
Fail a Stage 20 times.
Clear Survival Challenge.
Catch a Tadpole.
Play Survival Challenge.
Clear Sayonara UmiharaKawase +.
Clear Tadpole.
Browse the Illustration Gallery.
Acquire 10 backpacks.
Check all Walkthrough Tips in the Gallery.
Browse the Sound Gallery.
Fail a Stage while holding a backpack.
Acquire two backpacks at the same time.
Acquire a backpack.
Clear the second door in a Stage.