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