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