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