Here is the full list of all 29 Edna & Harvey: Harvey's New Eyes achievements. It takes around 8-10 hours to unlock all of the achievements on Windows.
Defeat the Mother Superior.
I hate mini games!
Finish chapter three.
Multiple endings? I need to see 'em all.
Did someone here order a pizza?
Droggeljug!
Defeat all Harveys.
I hear someone singing ...
If in doubt - give him a clout!
Sleep!
They don't really have quicktime events in this game, right?
Row, kid! Row for your life!
Finish chapter two.
Hoo hoo. Whit woo. Terwit terwoo.
Find the right path.
Justice prevails.
I need more coffee! More!
Even the sun follows my command!
I think I've been here before ...
Finish chapter one.
That doesn't apply to me.
Aaaargh!
Floating in the summer sky.
Lilli's arms were too short.
X marks the spot.
Help the old man.
Shibuya power!
How's that supposed to help?
I don't need no tutorial!