Here is the full list of all 16 Ink achievements worth 1,000 gamerscore.
Should hide things better next time
Nothing can stop you
Find 10 hidden messages
Didn't know you could do that
I had a feeling something was here...
Are you OK?
I've heard bad things about you...
They just keep coming back!
Didn't see me coming now, did ya?
Better show some respect
What did it ever do to you?
How can you be so bad?
Welcome to INK. Good luck!
100% the game
Beat World 2 without dying
Beat World 3 without dying