Here is the full list of all 10 Swallow the Sea achievements.
Complete Swallow the Sea without taking damage.
Complete Swallow the Sea without dying.
Get kissed by the Orro.
Complete Swallow the Sea.
Consume the Orro.
Become an only child.
It happens to the best of us.
Complete Swallow the Sea in under 4 minutes.
Consume all Vobbles without dying.
100% Swallow the Sea