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.
Multiple endings? I need to see 'em all.
Finish chapter three.
I hate mini games!
Defeat all Harveys.
Defeat the Mother Superior.
I hear someone singing ...
If in doubt - give him a clout!
Droggeljug!
Sleep!
Did someone here order a pizza?
Aaaargh!
That doesn't apply to me.
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.
Floating in the summer sky.
Help the old man.
X marks the spot.
Lilli's arms were too short.
Shibuya power!
How's that supposed to help?
I don't need no tutorial!