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