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