Here is the full list of all 23 Loddlenaut achievements.
Reach the maximum loddle capacity in all biomes.
Encounter all loddle evolutions.
Run out of oxygen for the first time.
Leave GUP-14.
Pet a loddle.
Have the maximum number of loddles following you.
Release a loddle into the open ocean.
Clean all biomes on GUP-14.
Reach the maximum loddle capacity in a biome.
Find all Holo-Badges.
Find the abandoned CEO office.
Destroy 80 crates.
Enter Metzi Trench.
Unlock the Puddle Scrubber.
Cook a loddle snack.
Collect 500 pieces of litter.
Discover a loddle’s favorite food.
Find a Holo-Badge.
Evolve a baby loddle into an adult.
Clean a biome to 100%.
Clean up a goopy loddle.
Meet a loddle for the first time.
Complete the Home Cove tutorial.