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?
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.
Even the sun follows my command!
I need more coffee! More!
I think I've been here before ...
Finish chapter one.
That doesn't apply to me.
Aaaargh!
Lilli's arms were too short.
Floating in the summer sky.
X marks the spot.
Help the old man.
Shibuya power!
How's that supposed to help?
I don't need no tutorial!