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