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.
Consume all Vobbles without dying.
Get kissed by the Orro.
Complete Swallow the Sea without dying.
Complete Swallow the Sea.
Become an only child.
Consume the Orro.
It happens to the best of us.