Here is the full list of all 20 Vessel achievements.
Find a use for the waterfall under the workshop
Traverse the caves back to the workshop without water touching your light
Create a fluro that is it's own worst enemy
In the mines, gaining access to one of the machines requires precise guiding of light & dark fluros. Solve the puzzle in one go.
Create a fluro with both blue goo and red goo
Descend into the mines without using the elevator
Repurpose the farm's watering system to fly higher than the trees
Create every possible combination of fluro and liquid types
Collect every protoplasm blob in the game
Collect every protoplasm blob in the mines
Create a fluro with every kind of eye
Fix all broken extractors in the mines
Fix every broken machine, windmill and extractor in the game
Collect every protoplasm blob in the orchard
Fix all broken windmills in the orchard
Create ten combinations of fluro and liquid types
Create five combinations of fluro and liquid types
Collect every protoplasm blob in the factory
Fix all broken machines in the factory
Stomp a fluro into the turbine that created it