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