Here is the full list of all 19 GoNNER achievements.
You jumped on 20 enemies in a row
There's nothing there! No easter egg, no extra item, no nothing. Just a dumb achievement.
Did you just run out of colors?
Didn't have to skip death.
I believe in you, get back up.
You became Death.
you found sally
You completed Death world! Woah!
You pushed that big piece of trash off your lawn. Good on you.
I'm a serious adult person and I think this kind of humor is childish and should be banned.
You completed Shooty world! Smooth!
You completed the Robot world. Impressive.
You hit the glyph cap!
These combos are just getting ridiculous...
You completed the Cave world. Good job.
You got a combo of 15!
It's not even ASCII, how can it even be called Roguelike???
You got a combo of 5
You picked up a glyph!