Here is the full list of all 16 Dive Inside achievements.
Collect 10 pieces of gold.
Collect 25 pieces of gold.
Collect 100 pieces of gold.
Collect 200 pieces of gold.
Find 10 hidden items
Find 20 hidden items
Find 50 hidden items
Find 80 hidden items.
Find all hidden items.
Go through the first episode with loss of less than 30 boats
Lose the first boat.
Split 100 boats.
Go down to the very bottom.
Complete all episodes.
Find all the flocks of fish.
Maximize the boat.