Here is the full list of all 63 Pixplode achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Get three stars on twenty levels
What's supposed to be lucky there?
Finish level 16 in three moves.
Get three stars on ten levels.
Sooo, fifteen? Heh. Heh. Heh...
Make a block fly very fast
Short form of "AAAAAAAAAAA"
"You just rotated the 6, right?" - "No, it has a different background!"
Complete all tutorial levels.
"(...) then shalt thou count to three, no more, no less. Three shall be the number thou shalt count, and the number of the counting shall be three. Four shalt thou not count, neither count thou two, excepting that thou then proceed to three. Five is right out. Once the number three, being the third number, be reached (...)"
"Ein, zwei - polizei"
Remember - not a prime number.
Zero. Zilch. Zip. Nada. Nothing.
Complete level 30.
Get three stars on thirty levels
Get three stars on forty levels
Get three stars on fifty levels
Finish the game
What is the purpose of this letter anyway? Either you read is as "z-" or as "ks-"
"Pointless"? I don't think so.
PLEASE, do not leave it unclosed
Thanks to emotes it has become much more popular than it's brother
Mr. Nobbs couldn't make it, unfortunately.
I shall call it... "Semifred"?
Awww, you shouldn't have...
And Obelisk... OK, now you try to write something funny there.