Here is the full list of all 12 Doggo Dig Down achievements.
Find your first power-up in the sky.
Find half of the power-ups.
Reach the top of the sky.
Find your first hat underground.
Find half of the buried hats.
Find all nine hats.
Reach the bottom of the world.
Put the bone in its final resting place.
Discover the last secret of the game.
Use all nine colors above and below ground (in one session).
Jump on thirty different clouds (in one session).
Toggle Grid Mode on and off.