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